Quarter 2 Quiz 2.docx

Quiz 2 Grade & Sec. ______________________________________ Electromagnetic Waves 13. Our eyes are able to see waves in this part of the electromagnetic spectrum ultraviolet radio visible infrared 14. Any warm object emits this wave. Night vision cameras are able to detect this type of wave. gamma rays visible light microwaves infrared

Encircle the correct answer. 1. Gamma rays travel faster than visible light. true false

15. These rays are emitted by the sun (and other white hot objects). Over-exposure to these rays can burn the skin and cause skin cancer. gamma rays ultraviolet microwaves infrared Write the letter of the correct answer.

2. All electromagnetic waves travel at the same speed in a vacuum. true false 3.

The speed of light in a vacuum is... 3 m/s. 30 m/s. 300 m/s 300,000,000 m/s

4. The longer the wavelength the _______ the frequency lower higher 5. Which of the following has the highest frequency? ultraviolet microwaves x-rays 6. Which of the following has the highest frequency? visible light microwaves infrared 7. Which of the following has the longest wavelength? gamma rays visible light ultraviolet 8. Which of the following has the shortest wavelength? gamma rays visible light ultraviolet 9. Which of the following has the lowest frequency? ultraviolet microwaves radiowaves 10. These waves have the longest wavelength and are used to carry signals for radar, TV and radio radiowaves ultraviolet microwaves infrared 11. These rays are absorbed by bones and teeth but pass through flesh radiowaves x-rays visible light infrared 12. These waves are used to cook food (they are absorbed by water molecules in the food) gamma rays x-rays ∂Name:

micro-waves

ultraviolet

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___1. What electromagnetic wave wave is sometimes called heat rays? a. gamma rays b. infrared c. radio waves d. visible light ___2. Which electromagnetic wave carries more energy than the others? a. microwaves b. radio waves c. UV radiation d. visible light ___3. What is the range of frequencies are our eyes sensitive to? a. 3 x 109 - 3 x 1011 Hz b. 3 x 1011 - 4 x 1014 Hz c. 4 x 1014 - 7.5 x 1014 Hz d. 7.5 x 1014 - 3 x 1016 Hz ___4. All electromagnetic waves travel through a vacuum at ____. a. Speeds that are inversely proportional to their frequency b. Speeds that are proportional to their frequency c. Speeds less than 3 x 108 m/s d. The same speed ___5. Which of the following correctly lists electromagnetic waves in order from longest to shortest wavelength? a. Gamma rays, ultraviolet, infrared, microwaves b. Microwaves, ultraviolet, visible light, gamma rays c. Radio waves, infrared, gamma rays, ultraviolet d. Radio waves, infrared, visible light, x-rays