Science 8
Unit 2
Astronomy
Name: ______________________________________________
Date: __________________________ Period: ____________
The Electromagnetic Spectrum
AM Radio: 530 – 1600 kHz
FM Radio: 88-108 MHz
Cellular Telephones: 824-894 MHz
TV: 54-88 MHz (channels 2-6)
TV: 174-216 MHz (channels 7-13)
TV: ultra-high frequency (UHF) 470-890 MHz
The FCC also assigns ranges within radio and TV waves for use by airplanes, ships, police, military, cellular phones and
amateur ham radio users. The federal government restricts usage of specific bandwidths within radio frequency for
military use only.
Use the illustrations of transverse waves drawn below to answer the following questions.
X
Y
Z
The highest point on a transverse wave is the ________________, while the lowest part is the ________________. The ________________
of a wave is a measure of the amount of energy it carries. The distance from one crest to the next crest is the
___________________. The ________________ is a measure of the number of waves that pass a point in a given amount of time.
Wave X and Y have the same ___________________, but wave Y has twice the ____________________ of Wave X. Wave Z has half the
_________________________ of X and Y. Wave Z has 5 times the ____________________ than Y. Finally, Wave ____ has the most energy
and Wave _____ has the least amount of energy. I know this because Wave ____ has much more _________________ than Wave X
and Y.
Carefully review the table and answer the following questions:
Type of Wave
Wavelength range (m)
Gamma Rays
X-Rays
Ultraviolet
Infrared
Microwave
Radio wave
10-15 – 10-11
10-11 – 10-9
10-9 – 10-7
10-6 – 10-3
10-3 – 10-1
10-1 – 105
1.
Which of the following wavelength could be broadcast a rock and roll radio station?
A. 10-12 meters
C. 105 meters
B. 10-8 meters
D. 10-3 meters
2.
If a device emits an electromagnetic wave with a wavelength of 10 -10 meters, then it is probably __________.
A. an X-ray machine
C. a microwave
B. an AM/FM car radio
D. a light bulb
3.
Food can be heated rapidly in your own home using an electromagnetic wave with a wavelength of _____________.
A. 10-13 meters
C. 10-2 meters
-9
B. 10 meters
D. 100 meters
4. Which value is larger in frequency?
Gamma Rays or Radio waves?
X-Rays
or Ultraviolet?
Visible Light or Infrared?
Microwaves or Visible Light?
5. What does ROY G BIV stand for? ____________________________________________________________