Blue laser pointers are now available if the blue laser, Physics

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Blue laser pointers are now available if the blue laser

a) A typical red laser pointer emits 5 mW of light at 660 nm. Calculate the number of photons per second being emitted from the laser.

b) Blue laser pointers are now available. If the blue laser emits 5 mW of light at 473 nm, how many photons per second is it emitting?

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Physics: Blue laser pointers are now available if the blue laser

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