Question: (a) How many photons per second are emitted by a monochromatic light-bulb (( = 650 nm) that emits 45 W of power? (b) If you

(a) How many photons per second are emitted by a monochromatic light-bulb (( = 650 nm) that emits 45 W of power?
(b) If you stand 15 m from this bulb, how many photons enter each of your eyes per second? Assume your pupil is 5.0 mm in diameter and that the bulb radiates uniformly in all directions?

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