Monochromatic light of frequency 6.0 × 1014 Hz is produced

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Monochromatic light of frequency 6.0 × 10¹⁴ Hz is produced by a laser. The power emitted is 2 × 10–3 ω. The number of photons emitted, on the average, by the sources per second is

1. 5 × l 0¹⁶
2. 5 × 10¹⁷
3. 5 × 10¹⁴
4. 5 × 10¹⁵

Correct Option: D

Since p = nhν

⇒ n =	p	=	2 × 10^-3	= 5 × 10¹⁵
	hv		6.6 × 10^-34 × 6 × 10¹⁴