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Calculate the mass of a photon of light ...

Calculate the mass of a photon of light of wavelength 580 nm.

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Velocity of light `=3.0xx10^(8)ms^(-1)`, Wave length of light = 580 nm
Mass of photon, `m=(h)/(lambda c)= (6.626xx10^(-34)"kg m"^(2)s^(-1))/(3xx10^(8) ms^(-1) xx 580xx10^(-9)m)=3.80xx10^(-36)kg`
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