View Single Post
Sci Advisor
HW Helper
P: 11,927
 Quote by rahuld.exe $$m_{SR}=\frac{m_{0}}{\sqrt{1-\frac{v^{2}}{c^{2}}}}$$ according to this formula... anything that travels with speed of light will have infinite mass... but light also travels like a matter.... and so light(matter) obviously travels at the speed of light.... doesnt it imply that light(as a matter) has infinite mass?
It's better to think of and use only one formula which is valid for all <particles> from special relativity.

$$E^{2}=m_{0}c^{4}+p^{2}c^{2}$$

With operators instead of scalar functions, this formula holds valid in quantum specially-relativistic theories as well. That's where the photons come from.