A Helium-Neon Laser Emits Light of Wavelength 632 $\times$ 10¹⁴
B)9

Multiple Choice

A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 3 mW.How many photons are emitted per second by this laser?

A) 9.55 $\times$ 10¹⁴
B) 9.55 $\times$ 10¹⁵
C) 8.24 $\times$ 10¹⁵
D) 6.53 $\times$ 10¹⁵
E) 4.78 $\times$ 10¹⁵