A helium-neon laser emits red light having a wavelength of 6.4 *10-7 m and a power of 0.5 mW.How many photons are emitted each second?
A)6.4*1038
B)1.6 *1021
C)3.2 * 1025
D)2.6* 1018
E)1.6 * 1015

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The Answer of A helium-neon laser emits red light having a wavelength of 6.4 *10-7 m and a power of 0.5 mW.How many photons are emitted each second?
A)6.4*1038
B)1.6 *1021
C)3.2 * 1025
D)2.6* 1018
E)1.6 * 1015

A Helium-Neon Laser Emits Red Light Having a Wavelength of 6.4