A ruby laser puts out a pulse of red light at a wavelength of 694 nm. (The
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A ruby laser puts out a pulse of red light at a wavelength of 694 nm. (The ruby laser is described in the essay on p. 226.) If a pulse delivers 1.05 × 105 watts of power for 280 цs, how many photons are there in this pulse? (1 watt = 1 J/s.)
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The number of photons in each pulse is determined by dividing the energy ...View the full answer
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