# The red light has the longest wavelength in spectrum so according to equation e=hc/lamda but than why it proves ienstine equation e=mc^2 wrong?

Feb 20, 2018

Those 2 formulae are used in different situations. They do not prove Einstein wrong.

#### Explanation:

In $E = \frac{h c}{\lambda}$, the E is the energy of a photon.

In $E = m \cdot {c}^{2}$ the E is the energy released when a mass is totally annihilated.

I hope this helps,
Steve