Question

why bohrs orbits are also known as energy levels

Answer 1

Hey mate, here is your answer :
Each orbit or shell has a fixed amount of energy associated with it. Thus, the shells are also known as energy levels or energy shells. Hope this answer helps you !

Answer 2

As we go far and far from the nucleus energy of the electron increases and as we go near the nucleus the energy of the electron decreases. Different orbit has different energy this creates the energy level. Therefore Bohr's orbit is also known as energy level.