Electromagnetic Waves Review #1
1) What type of waves are radio waves?
2) What type of waves are ultra violet wave?
3) List the complete visible light spectrum from highest to lowest frequency.
4) List the complete electromagnetic spectrum from longest to shortest wavelength.
5) How much of the electromagnetic spectrum is light?
6) What is the speed of light? The speed of x rays?
7) If we have light of the color green, then increase the wavelength, what will happen to the light we see?
8) If we have light of the color green, then increase the frequency, what will happen to the light we see?
9) If we have light of the color green, then increase the amplitude, what will happen to the light we see?
10) If a radio wave has a wavelength of 2.4 m, what is its frequency?
11) If a light wave has a frequency of 4 X 1014 hz, what is its wavelength?
12) Which two parts of the electromagnetic spectrum can be dangerous?
13) Name two parts of the electromagnetic spectrum that can be used for communication.
14) How are sound and light waves different?
Electromagnetic Waves Review #1 Key
1) What type of waves are radio waves?
All of the electromagnetic spectrum are transverse waves
2) What type of waves are ultra violet wave?
All of the electromagnetic spectrum are transverse waves
3) List the complete visible light spectrum from highest to lowest frequency.
Violet, Indigo, Blue, Green, Yellow, Orange, Red
4) List the complete electromagnetic spectrum from longest to shortest wavelength.
Radio waves, Micro waves, Infra Red, Visible Light, Ultra Violet. X rays, Gamma Rays
5) How much of the electromagnetic spectrum is light?
Very small
6) What is the speed of light? The speed of x rays?
All of the electromagnetic spectrum is 3X108 m/s
7) If we have light of the color green, then increase the wavelength, what will happen to the light we see?
If wavelength increases, frequency decreases. If frequency decreases, we move towards the red end of the
spectrum. So ROYGBIV, starting at G and moving toward R gives us yellow.
8) If we have light of the color green, then increase the frequency, what will happen to the light we see?
If frequency increases, we move towards the violet end of the spectrum. So ROYGBIV, starting at G and
moving towards V gives us blue.
9) If we have light of the color green, then increase the amplitude, what will happen to the light we see?
Just as amplitude in sound made that sound louder, amplitude in light will just make that light more
intense or brighter.
10) If a radio wave has a wavelength of 2.4 m, what is its frequency?
λ= 2.4 m
v=λf
V = 3X108 m/s
3X108 m/s = (2.4 m)(f)
F=?
f=125000000 hz
11) If a light wave has a frequency of 4 X 1014 hz, what is its wavelength?
λ= ?
v=λf
V = 3X108 m/s
3X108 m/s = (λ)( 4X1014 hz)
F= 4X1014 hz
λ=7.5X10-4 m
12) Which two parts of the electromagnetic spectrum can be dangerous?
X rays and Gamma rays have a high amount of energy and can be dangerous
13) Name two parts of the electromagnetic spectrum that can be used for communication.
Radio waves and Micro waves are used for communication
14) How are sound and light waves different?
Speed, wave type, energy carried