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How many photons are produced in a laser pulse of 0.177 J at 413 nm? ___________...

How many photons are produced in a laser pulse of 0.177 J at 413 nm?

___________ photons
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hc 1 m wavelenth 413 nmx 10 nm б.62бх 1034 Js:3x108 m/s 4.13x10 nm 4.81x10-19j So, energy of single proton is4.81x1019 J umbe

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