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

Question

Select True or False for the following statements about electromagnetic waves. Visible light is often emitted when valence electrons change their state. A vertical automobile antenna is sensitive to electric fields polarized horizontally. X-rays travel in vacuum at a higher speed than the visible light. The sun's radiation is most intense in the visible region. Gamma rays can be produced through electrons oscillating in wires of electric circuits. Ultraviolet radiation causes common sunburn. Blue light has a higher frequency than X-rays.

Explanation / Answer

1. True

Reason - Valence electrons are outer electrons. Visible light is emitted when they change their state.

2.False

Reason - Because atoms in the antenna will not be able to move far in order to pick up the signal in horizontal.

3. False

Reason - x-rays and visible light both are electromagentic waves so they travel at same speed in vacuum. speed may change in other mediums.

4. True

Reason - Since we can see the sun, it is obvious that it will have more radiation.

5. False

Reason - Only transition in nuclear states will produce gamma rays

6. True

7. False

Reason - Blue light has higher wavelength so it has lower frequency than x-rays

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