Answers are in blue.

1. If four wave crests pass you every second, then the frequency f=4 s^-1. What is the interval of time between the passing of each wave crest? (This interval is the period.)

a. 0.25 second.
b. 0.5 seconds.
c. 1 second.
d. 2 seconds.
e. 4 seconds.

2. A wave has a velocity of 1 m/s and a wavelength of 2 m. If you start your stopwatch when a wave crest passes, how long until the next wave crest?

a. 0.5 second.
b. 1 second.
c. 2 seconds.
d. There is not enough information to answer this question.
e. None of the above.

3. Which of the following colors of light has the longest wavelength?

a. Red.
b. Orange.
c. Green.
d. Blue.
e. Violet.

4. Which of the following forms of electromagnetic radiation has the shortest wavelength?

a. Ultraviolet.
b. Radio waves.
c. X rays.
d. Infrared.
e. Gamma rays.

5. Photons in which of the following spectral regions have the most energy?

a. Gamma rays.
b. X rays.
c. Visible light.
d. Infrared.
e. Radio.

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Last modified 23 February, 2007. © Gregory C. Sloan.