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A Laser Emits Photons of Energy 5

Question 6

Multiple Choice

A laser emits photons of energy 5.0 eV with a power of 10^-² W. How many photons are emitted each second?

A) 4.0 × 10¹⁴
B) 2.7 × 10¹⁵
C) 5.0 × 10¹⁸
D) 3.1 × 10²¹
E) 2.5 × 10²¹

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