1.

Calculate the mass of a photon with wavelength 3-6 Å.

Answer»

Lambda =3.6 Å = 3.6*10^-10m

Velocity of photon = velocity of light

M = h/lambda*v = 6.626*10^-34js/ (3.6*10^-10m)(3*10^8 m/s)

= 6.135*10^-29 Kg

Therefore, Mass of photon= 6.135*10^-29 Kg



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