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Solved: A typical red laser pointer has a power of 5 mW.
Chapter 7, Problem 157P(choose chapter or problem)
QUESTION:
A typical red laser pointer has a power of 5 mW. How long would it take a red laser pointer to emit the same number of photons emitted by a 1-W blue laser in 1 s? (1 W = 1 J/s.)
Questions & Answers
QUESTION:
A typical red laser pointer has a power of 5 mW. How long would it take a red laser pointer to emit the same number of photons emitted by a 1-W blue laser in 1 s? (1 W = 1 J/s.)
ANSWER:Step 1 of 3
A typical red laser pointer has a power of 5 mW. We need to find how long it would take a red laser pointer to emit the same number of photons emitted by a 1-W blue laser in 1 s.
Since it is a blue light, let us assume that it has a wavelength. The energy can be solved by