Question

Anyone , please explain
According to special theory of relativity ,
E2=(mc2)2 + (pc)2 , rest mass of photon is 0 , so the equation become E=pc

h * frequency of em wave = p * wavelength * frequency

P= h / wavelength..............

I understand that equation for photon , but why that momentum equation is applied to other heavy partical like electron , they have rest mass too , please answer​

Answer 1

Answer:

E = mc2. It's the world's most famous equation, but what does it really mean? "Energy equals mass times the speed of light squared." On the most basic level, the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.