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

Question

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

True False  Gamma rays can be produced through electrons oscillating in wires of electric circuits.
True False  Visible light is often emitted when valence electrons change their state.
True False  The sun's radiation is most intense in the infrared region.
True False  A vertical automobile antenna is sensitive to electric fields polarized horizontally.
True False  Radio waves travel in vacuum at a lower speed than the visible light.
True False  X-rays are produced by a glowing light bulb.
True False  Ultraviolet radiation causes common sunburn.

Explanation / Answer

1)

False, gamma rays can not be produced this way. Nuclear state transitions will produce gamma rays.

2)

True, valence electrons are the outer electrons of an atom. When these change states, visible light is emitted.

3)

False, since we can see the sun, the most intense radiation is in the visible spectrum.

4)

True, if it were not, the atoms in the antenna would not have very far to move in order to pick up the signal.

5) True

6) False

7) True

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