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

Question

Select True or False for the following statements about electromagnetic waves. like X-rays travel in vacuum at a higher speed than the visible light. TrueGamma rays travel in vacuum at the same speed as the visible light. FalseRadio waves have higher frequencies than gamma rays. TrueThe sun's radiation is most intense in the infrared region. True Ultraviolet radiation causes common sunburn. FalseRadio waves have wavelengths longer than 1 m. FalseA vertical automobile antenna is sensitive to electric fields polarized horizontally. False

Explanation / Answer

(1) False

X-Ray has the same velocity as the velocity of light.

(2) True

It has the same velocity as the velocity of light.

(3) False

Radio waves have the frequencies in the range 3*10^1 to 3*10^9 Hz

whereas gamma waves have frequencies 3*10^9 or higher.

(4) False

(5) True

Ultravoilet radiation causes sunburn and cancer.

(6) True

As explained in (3)

(7) False

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