Question

The monochromatic light of frequency 12 × 1014 Hz is produced by a laser. The power emitted
is 3 ×10–3 W. (3)
(a) What is a photon?
(b) Find the energy of a photon produced by the laser.
(c) How many photons per second are emitted by the laser?

Answer 1

Answer:

dual nature of radiation and matter.

givern. V=6×10+14Hz

power emitted by light p=2×10−3w

energy of one photon is given by 

energy =hv→i

Number of photons emitted per second =enwrgy of one photonpower

=6.63×10−34×6×10142×10−3

⇒ 5.03×1015 → ii