Multiple Choice
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
Correct Answer:
Verified
Correct Answer:
Verified
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