Question

A particular green laser pointer emits light with a wavelength of 532 nm , and it...

A particular green laser pointer emits light with a wavelength of 532 nm , and it is advertised as having a power of 6 mW .

1. What is the energy of a single photon in this laser beam?

2.How many photons are emitted by this laser in 1 second?

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Answer #1

> As we know that the energy associated with a single photon u given by. Enn - he h = planks constant = 6.6 X1634 Is r= freq> part (2) the source = P = 6 *10°W Power Ermitted by Power = Energy - E = ? time E= Pxt So, energy emited by source in 4 sec

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