Shorter wavelength= Higher Frequency longer

AIM: What is the Electromagnetic
Spectrum?
Identify the parts of the
electromagnetic spectrum
Demonstrate the relationship between
wavelength and frequency in the EM
spectrum
AIM: What is the Electromagnetic
Spectrum?
electromagnetic spectrum, radio
waves, infrared rays, visible light,
ultraviolet rays, x rays, gamma rays
Roy G. Biv
AIM: What is the Electromagnetic
Spectrum?
Light is an electromagnetic wave
But we can see light.
Most E/M waves can not be seen!
AIM: What is the Electromagnetic
Spectrum?
Pure visible white light is actually
made up of various colors of the
spectrum.
This rainbow of colors is clearly visible
when looking at light through a prism
AIM: What is the Electromagnetic
Spectrum?
Examine light through a prism or a
spectrometer!
What do you see?
Roy g biv
When you look at light through a
prism you may see something
which looks like this!
AIM: What is the Electromagnetic
Spetrum?
Light through a prism is diffracted
according to its frequency and
wavelength
Red has a longer wavelength
speed = Frequency x wavelength
Red has a longer wavelength
speed = Frequency x wavelength
Since the speed of light is constant
What can you conclude about its
frequency
It must be smaller
Blue has a shorter wavelength
speed = Frequency x wavelength
Since the speed of light is constant
What can you conclude about its
frequency
Shorter wavelength = greater frequency!
Long W/L
Short W/L
Colors of the Spectrum
Radio Waves: Have a long W/L.
What type of frequencies would they have?
Microwaves: What are microwaves?
Infrared: You can not see infrared waves.
You can feel them as heat
Visible Light: ROY G. BIV
Ultraviolet Ray: Can not be seen.
In sunlight. Causes sunburn.
Also used to kill bacteria
X Ray: Can not be seen. Have a short W/L.
What type of frequency do they have?
What are they used for?
Gamma Ray: Have a very short W/L.
What type of frequency do they have?
Used in nuclear physics
longer wavelength=
Shorter wavelength=
lower Frequency
Higher Frequency
onger wavelength=
Shorter wavelength=
ower Frequency
Higher Frequency
AIM: What is the Electromagnetic
Spectrum?
Class Activity:
W/S Concepts 9-9
AIM: What is the Electromagnetic
Spectrum?
Homework:
INTERNET QUESTIONS

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