Select True or False for the following statements about electromagnetic waves. 1
ID: 1635214 • Letter: S
Question
Select True or False for the following statements about electromagnetic waves.
1. X-rays travel in vacuum at a higher speed than the visible light.
2. The Earth's atmosphere is quite transparent to infrared radiation.
3. Visible light is often emitted when valence electrons change their state.
4. Gamma rays can be produced in transitions of an atomic nucleus from one state to another.
5. The sun's radiation is most intense in the infrared region.
6. A vertical automobile antenna is sensitive to electric fields polarized vertically.
7. Radio waves travel in vacuum at a lower speed than the visible light.
Explanation / Answer
1. Xrays and visible lights , both are electromagnetic radiations and haence travel at the same speed in vaccum.
False
2. The earth's atmosphere traps IR radiation when gases like CO2 and Methane increase in concentration.
True
3. Visible light is produced in the Balmer Series of hydrogen spectrum
True
4. Gamma rays are produced in the nuclear state transitions, so
True
5. The sun's radiation is most intense in the visible region
False
6. Vertical automobile antennas are sensitive to parallel polarisation
so True
7. Againfrom the first point
False