Q1 of 69 Page 363

Can we find the mass of a photon by the definition p = mv?

The formula p=mv is valid in classical mechanics where the object or say particle has significant mass or size. The photon does not have significant mass or size and hence classical mechanics is invalid and p=mv cannot be used to determine the mass of photon.


More from this chapter

All 69 →
2

Is it always true that for two sources of equal intensity, the number of photons emitted in a given time are equal?

 3

What is the speed of a photon with respect to another photon if

(a) the two photons are going in the same direction and


(b) they are going in opposite directions?


 4

Can a photon be deflected by an electric field? By a magnetic field?

 5

A hot body is placed in a closed room maintained at a lower temperature. Is the number of photons in the room increasing?