Question

If energy of photon E=hv. Momentum of Photon p=h/lamda then velocity of photon will be

Answer 1

In general, Photon is a quantum of radiation with energy E = hv,

where v is frequency and h is Planck’s constant.

E=hv, p=h/lambda,then,

Mass×velocity=h/lambda, Velocity=h/lambda×mass,

Velocity=E/v/lambda×mass, Velocity=E/v×lambda×mass.

In general E=nhv,

Where,

E= Energy,

n= Number of photons,

h= Planck's constant,

v= Frequency of photon.

Therefore, E= (1)hv(For a single photon n =1) is the energy of just a single photon.

Answer 2

E=hv

E=hc/lamda

h/lamda =p

E=PC

C=E/p

C= velocity