A cube of unit volume contains 35 10^7 photons of frequency 10^ 15 Hz. If the energy of all the photons is...

Question

A cube of unit volume contains 35 10^7 photons of frequency 10^ 15 Hz. If the energy of all the photons is viewed as the average energy being contained in the electromagnetic waves within the same volume, then the amplitude of the magnetic field is 10^ -9 T. Taking permeability of free space _0 = 4 10^ -7 Tm/A, Planck's constant h = 6 10^ -34 Js and = 22 7 , the value of α is ____

Accepted Answer

23

JEE Advanced 2025 Physics question

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