Question

explain the rule to travel with speed of light....no spam​

Answer 1

$\huge\underline\blue{Answer}$

According to special relativity, the energy of an object with rest mass m and speed v is given by γmc2, where γ is the Lorentz factor defined above. ... The speed of light is the upper limit for the speeds of objects with positive rest mass, and individual photons cannot travel faster than the speed of light.