Which of the following is correct regarding photons?
(i) A photon always travels at a speed `3xx10^(8)m//sec` in vacuum.
(ii) The rest mass of photon is zero.
(iii) Let E and p be the energy and linear momentum of a photon and v and `lambda` be the frequency and wavelength of the same light when it behaves as a wave. Then `E=h v =(hc)/(lambda)`
`p=(h v)/(c) =(h)/(lambda) =(E)/(c)`
(iv) A photon may collide with a meterial particle. The total energy and the total momentum remain conserved in such a collision. The photon may get absorbed and / or a new photon may be emitted. Thus, the number of photons may not be consverved.

Options

A. (i),(ii),(iii)
B. (ii),(iii),(iv)
C. (i),(iii),(iv)
D. All of the above.

Answer

D

Explanation

NA