Physics for pre-IGCSE-Homework sheet "5"- Term 2
Paper1:
1.
2.
What
A.
B.
C.
C
ose the best answer
causes refraction when light travels from air into glass?
The amplitude of the light waves changes.
The color of the light changes.
The frequency of the light waves changes.
The speed of the light changes.
The diagram shows a ray of light entering a block of glass. Which numbered angles are the angles of incidence and
of refraction?
angle
ray of
light
of ln cld ence
A
air
glass
3.
angle
of refr ction
3
8
1
4
C
2
3
@
2
4
Which diagram correctly shows a ray of light passing through a rectangular glass block?
c
4. A ray of light passes through a window.
Which path does it take?
Physics far pre-IGCSE-Hamewark sheet "5"- Term 2
\ mIrror X
5.
A ray of light is reflected
statement
B.
C.
D.
\
by two parallel plane mirrors X and Y. Which
j
\
is correct?
The
The
The
The
angle
angle
angle
angle
of
of
of
of
incidence
incidence
reflection
reflection
at
at
at
at
mirror
mirror
mirror
mirror
X
Y
X
Y
is
is
is
is
<~
30 ;; .•60
30°.
60°.
120°.
0°.
I'
<G~,~
\
b~
C:i) "
" mirror Y
\
Paper 6:
A student investigates
the refraction
of light through a transparent
block. He places the transparent
plain paper, largest face down, and draws a line round the block. He draws a line to represent
block on a sheet of
an incident ray and places
two pins Wand X in the line. Fig. 5.1 shows the outline of the block and the incident ray.
a.
On Fig. 5.1, draw a normal to line AB at the point where the incident ray meets the block. The incident ray is
drawn on the diagram. The positions of the two pins Wand X that mark the incident ray are shown.
o
h.
Measure the angle of incidence
c.
Draw in the refracted
d.
The ray emerges from the block in a direction that is pJrallel to the incident ray. Draw in this emergent ray.
e.
Two pins Y and Z are placed so that the pins Wand X, viewed through the block, and the pins Y and Z all appear
exactly in line with each other. Mark on the diagram, with the letters Y and Z, where you would place these two
pins.
'=
i.
I
ray with an angle of refraction
D
Fig. 5.1
2
.
of 20°. Continue this line until it meets the line CD
o
A
2.1--
x