PSC 2121 Lecture Notes - Lecture 5: Radio Wave, Electromagnetic Spectrum, Sound

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27 Apr 2016
Chapter 11-Light
Working Problems
1) The source of electromagnetic waves is vibrating
A) electric charges.
B) atoms.
C) molecules.
D) energy fields.
2) The frequency of an electromagnetic wave and the frequency of the vibrating electrons
that produce it are
A) nearly the same.
B) the same.
C) quite different.
3) Which of the following occupies the smallest percentage of the electromagnetic
A) radio waves
B) microwaves
C) visible light
D) gamma rays
4) Which of these has a higher frequency than visible light?
A) radio wave
B) microwave
C) infrared wave
D) ultraviolet wave
5) Which of these has the longest wavelength?
A) radio waves
B) microwaves
C) visible light
D) gamma rays
6) Electromagnetic waves can travel in
A) a vacuum.
B) water.
C) both
D) none of the above
7) The main difference between a radio wave and a sound wave is
A) frequency.
B) wavelength.
C) energy.
D) amplitude.
E) basic nature.
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