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Electro ag etic Spectru
Question Paper
Level
Subject
Exam Board
Module
Topic
Sub-Topic
Booklet
GCSE
Physics
Edexcel IGCSE
Double Award (Paper 1P)
Waves
Electromagnetic Spectrum
Question Paper
Time Allowed:
64 minutes
Score:
/53
Percentage:
/100
Grade Boundaries:
A*
A
B
C
D
E
U
>85%
75%
70%
60%
55%
50%
<50%
71. A teacher and two students are measuring the speed of sound.
150 m
The teacher makes a loud sound by hitting two cymbals together.
Each student starts a stopwatch when they see the teacher hit the cymbals. They
each stop their stopwatch when they hear the sound.
(a) Describe how a sound wave moves through the air.
(3)
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
(b) The students repeat the experiment and record their readings in a table.
Student
Time in s
Andrew
0.44, 0.46, 0.44, 0.48, 0.43
Kefe
0.5, 0.6, 0.4, 0.4, 0.6
(i) State the precision of Andrew’s readings.
(1)
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
(ii) State the equation linking speed, distance travelled and time taken.
(1)
(iii) The teacher was standing 150 m from the students.
Use the experimental data recorded by each student to complete the table below.
Give your answers to an appropriate number of significant figures.
(3)
Student
Andrew
Kefe
Mean (average) time in s
Speed of sound in m/s
(c) The students look in a data book and find that the speed of sound in air is given
as 341 m/s.
The students discuss their results.
My experiment was more accurate
because my answer was closest to
341 m/s.
No, you didn’t allow for reaction time.
My result is the best that you can get
with this method.
Andrew
No, reaction time didn’t matter
because I had to react twice and it
cancelled out.
Kefe
Evaluate these conclusions.
(5)
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
. ..... ..... . . . . . . . . . . . . . . ................. ................................. ............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. . . .. .. .. .. .. .. .. .. .. .. .
(Total for Question 7
1 = 13 marks)
Answer ALL questions.
12. This question is about parts of the electromagnetic spectrum.
radio
waves
A
infrared
visible
light
ultraviolet
B
gamma
rays
(a) The names of two parts of the electromagnetic spectrum are missing.
Complete the table with the names of the missing parts.
(2)
Name
A
B
(b) The Sun emits different types of electromagnetic waves.
(i) Which of these is the same for all the waves?
(1)
A amplitude
B frequency
C speed
D wavelength
(ii) Which type of electromagnetic wave causes sunburn and snow blindness?
(1)
A gamma rays
B infrared
C radio waves
D ultraviolet
(Total for Question 12 = 4 marks)
73. A student is listening to a radio.
(a) The radio is powered by batteries that provide a direct current (d.c.).
What is direct current?
(1)
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
(b) Radio waves are part of the electromagnetic spectrum.
(i) Suggest a property of radio waves that makes them suitable for use in communication.
(1)
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
(ii) Complete the table to show uses and possible harmful effects of some other
parts of the electromagnetic spectrum.
(4)
Part of
electromagnetic spectrum
microwaves
ultraviolet
Use
Possible harmful effect
on people
(c) In the radio, sound is produced by a loudspeaker.
The diagram shows the construction of a loudspeaker.
casing
magnetic poles
N
N
S
N
S
N
N
N
coil
on
tube
paper
cone
electrical supply
Describe how a loudspeaker uses an electrical supply to produce sound waves.
(5)
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
......... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .. .. .. .. .. .. ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ..... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... .... .... .... .... ..... .... .... .... .... .. . .. . .. .. . .. . .. .. . .. .. . .. . .
(Total for Question 73 = 11 marks)
;4. ( ;A( ; *E < *$$ ; /A AH3 < 1$ - A;1.'/ A* FE $;1. A( D/7
( < */-D
‡
‡
‡
*/$;; D-A;E*1- A
E*<*- -*'(A
45 1.3- A A( A- H ;;/'*/' A( < A(;
1; ; 1$ ; <*/' FE - /'A(7
AH3 < 1$ - A;1.'/ A* FE */
/-0
(,*#49 >=(*#9$
4$,3949 >=(*#9$
45 . AF1 1A( ; AH3 < 1$ - A;1.'/ A* FE 7
/;0
2 7 77777 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777 77777777777777777777777 777 777777777777777777777777777777777777777777 777777777777777777777 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77
C 7 77777 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777 77777777777777777777777 777 777777777777777777777777777777777777777777 777777777777777777777 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77
45 -A;E*1- A FE < ; D< $D- DA A( H / /' ;1D<7
4*5 AA AF1 D< < 1$ D-A;E*1- A FE <7
/;0
2 7 77777 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777 77777777777777777777777 777 777777777777777777777777777777777777777777 777777777777777777777 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77
777777777 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777777 7777777777777777777777 77777777777777777777777 7777777777777777777777777777777777777777 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 7
C 7 77777 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777 77777777777777777777777 777 777777777777777777777777777777777777777777 777777777777777777777 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77
777777777 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777777 7777777777777777777777 77777777777777777777777 7777777777777777777777777777777777777777 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 7
4**5 AA AF1 /' ;< 1$ D-A;E*1- A FE <7
/;0
2 7 77777 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777 77777777777777777777777 777 777777777777777777777777777777777777777777 777777777777777777777 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77
777777777 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777777 7777777777777777777777 77777777777777777777777 7777777777777777777777777777777777777777 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 7
C 7 77777 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777 77777777777777777777777 777 777777777777777777777777777777777777777777 777777777777777777777 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77
777777777 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 777777777 7777777777777777777777 77777777777777777777777 7777777777777777777777777777777777777777 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 77 7
/,9( ,3 <49&,* ;
4 5 )3'40
Answer ALL questions.
1 5. The table shows the main sections of the electromagnetic spectrum.
Gamma rays
X-rays
Ultraviolet
Visible
Infrared
Microwaves
Radio
(a) (i) State two sections of the spectrum that are used for communications.
(2)
1 ... .... . . . . . . . . . . . . . . . ....................... ................................. ..................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
2 ... .... . . . . . . . . . . . . . . . ....................... ................................. ..................................... . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
(ii) State two sections of the spectrum that are used for cooking.
(2)
1 ... .... . . . . . . . . . . . . . . . ....................... ................................. ..................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
2 ... .... . . . . . . . . . . . . . . . ....................... ................................. ..................................... . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
(b) The arrow below the table shows the direction of
(1)
A increasing wave amplitude
B increasing wave frequency
C increasing wave speed
D increasing wavelength
(c) A radio station broadcasts at a frequency of 200 kHz.
The wavelength of the radio waves is 1500 m.
(i) State the equation linking wave speed, frequency and wavelength.
(1)
(ii) Calculate the speed of these radio waves and give the unit.
(3)
speed = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . unit . . . . . . . . . . . . . . . . . . . . . . . ..
(Total for Question 51 = 9 marks)
Answer ALL questions.
16. The diagram shows part of a water wave.
B
height
A
0
D
C
distance
(a) (i) Which letter represents the wavelength?
(1)
A
B
C
D
(ii) Which letter represents the amplitude?
(1)
A
B
C
D
(iii) This water wave is transverse. Other waves can be longitudinal.
State a similarity and a difference between a transverse wave and a longitudinal wave.
(2)
similarity
........ ...................... .................................. ............................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .
....... .... . . . . . . . . . . . . . . ...... ....................... ........... ............................................ ........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .
difference ...................... ........... ............................................ .............. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
....... .... . . . . . . . . . . . . . . .................. .............. ................... ........................................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
(b) A student writes some sentences about electromagnetic waves.
His teacher circles a mistake in each sentence.
In the table, write a suitable correction for each mistake.
The first one has been done for you.
(5)
Sentence
Correction
Electromagnetic waves travel at 3 × 102 m/s in a vacuum.
108
Sound waves are electromagnetic.
Infra-red waves are the most harmful to people.
Gamma waves are used for heating up food.
Radio waves have the highest frequency.
Gamma waves have a very long wavelength.
(Total for Question 61 = 9 marks)