How many photons per second are emitted by a 9.42 mW helium-neon laser with wavelength 632.8 nm? - DUAL NATURE OF MATTER AND RADIATION Quiz | GKFix.in

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Question

How many photons per second are emitted by a 9.42 mW helium-neon laser with wavelength 632.8 nm?

A. 2.5 × 10¹⁶
B. 2.99 × 10¹⁶
C. 3.5 × 10¹⁶
D. 4.0 × 10¹⁶