Question: At what rate do photons emitted by a green-light laser ((lambda=532 mathrm{~nm})) hit a wall (2.00 mathrm{~m}) from the laser if the power rating is

At what rate do photons emitted by a green-light laser $(\lambda=532 \mathrm{~nm})$ hit a wall $2.00 \mathrm{~m}$ from the laser if the power rating is $5.00 \mathrm{~mW}$ ? What assumption must you make to solve this problem?

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