X rays are used in radar.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 2] Blackbody radiation is emitted from a small hole in a furnace.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 3] The main form of radiation that our bodies emit is ultraviolet.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 4] The frequency of visible light determines its color.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 5] The increase in the amount of carbon dioxide in the atmosphere is contributing to the greenhouse effect.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 6] The greenhouse effect occurs because carbon dioxide in the atmosphere absorbs ultraviolet radiation.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 7] The ozone layer absorbs infrared radiation from sunlight.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 8] The ionosphere reflects high frequency radio waves.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 9] An electric motor can be manually turned and made to act as a generator.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 10] A speaker can be used as a crude microphone.
a. True
b. False
Indicate whether the statement is true or false
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