Electromagnetic Spectrum Test
Multiple Choice: Select the best answer from the choices shown.
1. What part of the electromagnetic spectrum can be seen by humans?
A. Microwaves
C. Visible light
B. Infrared
D. Ultraviolet
2. What is happening when a person sees a red apple?
A. Red light is being reflected off the apple to the eye.
B. Red light is emitted from the apple to the eye.
C. White light is reflecting off the eye onto the apple.
D. White light is emitted from the apple to the eye.
The diagram below illustrates the electromagnetic (EM) spectrum. Use this diagram to answer the following
questions.
(From: http://science.hq.nasa.gov/kids/imagers/ems/waves3.html)
3. Which type of electromagnetic wave has the longest wavelength?
A. Visible light
C. Ultraviolet
B. Radio waves
D. Gamma rays
4. Which type of electromagnetic wave has the greatest frequency?
A. Visible light
C. Ultraviolet
B. Radio waves
D. Gamma rays
5. Which type of electromagnetic wave has the highest energy?
A. Visible light
C. Ultraviolet
B. Radio waves
D. Gamma rays
6. Which of the following waves have a shorter wavelength than visible light?
A. Infrared
C. Ultraviolet
B. Radio waves
D. Microwaves
7. The distance from one point on a wave to the exact same spot on the next wave is called the _________.
A. Wavelength
C. Crest or peak
B. Frequency
D. Velocity
8. How much of the electromagnetic spectrum is visible?
A. None of it
C. Most of it
B. Only a small part
D. All of it
9. List 2 uses of Microwaves (2 marks)
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10. Which waves are considered harmful to humans? (3 marks)
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11. Why are some EM waves harmful to humans? (2 marks)
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