question archive A 193nm-wavelength UV laser for eye surgery emits a 0
A 193nm-wavelength UV laser for eye surgery emits a 0
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A 193nm-wavelength UV laser for eye surgery emits a 0.500mJ pulse. (a) How many photons does the light pulse contain?
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nhc/lemda = energy
here,
energy = 0.5*10^-3 J
wavelength(lemda) = 193*10^-9 m
h = 6.62*10^-34
c = 3*10^8 m/s
so,
number of photons n = 4.854*10^14
