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Calculate the mass of a photon with wave...

Calculate the mass of a photon with wavelength 3.6 Å.

Text Solution

Verified by Experts

`lamda=3.6Å=3.6xx10^(-10)m`
Velocity of photon = velocity of light
`m=(h)/(lamdav)=(6.626xx10^(-34)Js)/((3.6xx10^(-10)m)(3xx10^(8)ms^(-1)))`
`=6.135xx10^(-29)kg`
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Knowledge Check

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

    A
    `6.135 xx 10^(29) kg`
    B
    `6.135 xx 10^(-29) kg`
    C
    `6.135 xx 10^(19) kg`
    D
    `6.135 xx 10^(16) kg`

  • What is the mass of a particle with a wavelength of 3.313 Å moving with a speed of 2.0 xx 10^(8) ms^(-1) ?

    A
    `10xx10^(-28)` kg
    B
    `2.0xx10^(-37)` kg
    C
    `10xx10^(-37)` kg
    D
    `2.0xx10^(-28)` kg

  • de-Broglie proposed dual nature for electron moving. The wavelength is given by the equations lambda = (h)/(m u) . Later on Heisenburg proposed. The total incertainly uncertainity principle as. With what velocity an electron must travel so that its momentum is equal to that of photon of wavelength of lambda = 5200 Å

    A
    `800 ms^(-1)`
    B
    `1400 ms^(-1)`
    C
    `400 ms^(-1)`
    D
    `200 ms^(-1)`

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