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Calculate the mass of a photon with wave...

Calculate the mass of a photon with wavelength `3.6Å`.

Text Solution

Verified by Experts

Here, `lamda = 3.6 Å = 3.6 xx 10^(-10)m`
As photon travels with the velocity of light, `v = 3.0 xx 10^(8) ms^(-1)`
By de Broglie equation, `lamda = (h)/(mv) or m = (h)/(lamda v) = (6.626 xx 10^(-34)Js)/((3.6 xx 10^(-10)m) (3.0 xx 10^(8) ms^(-1))) = 6.135 xx 10^(-29) kg`
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Knowledge Check

  • The mass of a photon of wavelength 1.54 Å is

    A
    `2.5xx10^(-32)` kg
    B
    `1.42xx10^(32)` kg
    C
    Both of these
    D
    None of these

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