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

ID: 1789350 • Letter: S

Question

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

Radio waves travel in vacuum at a lower speed than the visible light.

X-rays can be produced in transitions involving inner electrons in an atom.

Gamma rays can be produced through electrons oscillating in wires of electric circuits.

Visible light is often emitted when valence electrons change their state.

The Earth's atmosphere is quite transparent to infrared radiation.

A vertical automobile antenna is sensitive to electric fields polarized vertically.

The sun's radiation is most intense in the infrared region.

1) Radio waves travel in vacuum at a lower speed than the visible light.

Ans; False, Because Radio waves and visible light waves both are electro magnetic waves, so they move with the velocity of light.

2) X-rays can be produced in transitions involving inner electrons in an atom.

Ans: True, because the inner electrons easy to move

3) Gamma rays can be produced through electrons oscillating in wires of electric circuits.

Ans: False, because Gamma rays can not be produced through electrons oscillating.

4) Visible light is often emitted when valence electrons change their state.

Ans: True, because valence electrons are outer most electrons of an atom, then change the state, visible light is emitted.

5) The Earth's atmosphere is quite transparent to infrared radiation.

Ans: False, because the Earth's atmosphere is mostly opaque infrared radiation.

6) A vertical automobile antenna is sensitive to electric fields polarized vertically.

Ans: True, because the atoms in the antenna would not have very far to move in order to pick up the signal.

7) The sun's radiation is most intense in the infrared region.

Ans: False, because the most intense radiation is in the visible spectrum.