Question

The energy of photon whose momentum Is 10mev/c, where c is speed of light?

Answer 1

Energy of photon= (h ×C) ÷wavelength.

Wavelength =h ÷mv

So, E=h×C×mv ÷h

E=C×10mev÷C

E=10mev

Answer 2

Energy of photon = (h × C) ÷ wavelength

So, wavelength = h × mv

So, E = h × C × mv ÷ C

So, E = C × 10 mev ÷ C

Therefore, E = 10 mev.

Thanks....