Select True or False for the following statements about electromagnetic waves. X

Question

Select True or False for the following statements about electromagnetic waves. X-rays travel in vacuum at a higher speed than the visible light. The sun's radiation is most intense in the visible region. A vertical automobile antenna is sensitive to electric fields polarized horizontally. Radio waves have wavelengths longer than 1 m. Blue light has a longer wavelength than red. The Earth's atmosphere is quite transparent to infrared radiation. Gamma rays can be produced through electrons oscillating in wires of electric circuits.

Explanation / Answer

1.

False

Speed of X-rays and visible light is equal to speed of light in vacuum, which is c = 3*10^8 m/sec

2.

True, Since we can see the sun, So it's most intense in visible region.

3.

True

4.

True

5.

False

Red = 622-780 nm

Blue = 455-492 nm

6.

False,

7.

False, gamma rays are produced by nuclear transitions.

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