A 670mw helium neon laser emits a visible laser beam with a
A 6.70mW helium neon laser emits a visible laser beam with a wavelength of 636nm . How many photons are emitted per second?
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a 670mw helium neon laser emits a visible laser beam with a wavelength of 636nm how many photons are emitted per
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a 135 kg raccoon falls out of a tree and hits the ground with a kinetic energy of 12370 j what was the raccoons
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