Question

The output of a laser has pulse duration of 30 ms and average output power of 1 W per pulse. How much energy is released per pulse if wavelength is 6600 Å?

(a) 0.001 J

(b) 0.002 J

(c) 0.003 J

(d) 0.004 J

This question was addressed to me in an interview.

I'm obligated to ask this question of Pumping Mechanism in chapter Laser of Engineering Physics II

Answer 1

Right option is (c) 0.003 J

Best explanation: As we know, Energy = Power X Time

= 1 W X 30 X 10^-3s

= 0.003 J.