Question

Which of the following is an example of
optical pumping?
Select one:
a. Ruby laser
b. Helium-Neon laser
c. Semiconductor laser
d. Dye laser​

Answer 1

Explanation:

The atoms of Ruby are excited with the help of photons emitted by an external optical source. The atoms absorb energy from photos and raises to excited state. Therefore Ruby laser is an example of optical pumping.

Answer 2

Answer:

Ruby laser is the answer