Question

Calculate the mass of photon with wavelength 3.6 armstrong

Answer 1

lamda = 3.6 angstrom = 3.6 x 10^-10 m

velocity of photon = velocity of light

m = h/lamda*v ( from de-brogile’s equation)

m = 6.626 x 10^-34/3.6 x10^-10 x 3 x 10^8

m = 6.626 x 10^-32/10.8

m = 0.6135 x 10^-32

m = 6.135 x 10^-33 kg

Hope this will help!

Answer 2

Answer:

λ = h / MV

M = h / λV

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M --- mass of proton

h --- planck's constant

λ ---  Wave length

V --- Velocity

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λ = 3.6 A⁰ = 3.6 × 10⁻¹⁰ m

h = 6.626 × 10 ⁻³⁴  

V  =  3 × 10⁸ m/s  

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∴ M = ( 6.626 × 10 ⁻³⁴ ) / [ ( 3.6 × 10⁻¹⁰ ) × ( 3 × 10⁸)]

      = 6. 135 × 10⁻³³ kg