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HeNe laser emits light of a wavelength 632.8 nm and has an output power of 2.3 MW. How many photons are emitted each minute by this laser when operated? - Quora
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A laser gun of power 3 mW and mass 50 gm emits photons of wavelength 500 nm. It is a gravity frequency space and emits for one hour. Find the distance covered
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