Monochromatic light of frequency 6 × 1014 Hz is produced by a laser. The power emitted is 2 × 10–3 W. How many photons per second on an average, are emitted by the source ?
(Given h = 6.63 × 10–34 Js)
1
9 × 1018
2
6 × 1015
3
5 × 1015
4
7 × 1016
5
Question Not Attempted