Use the Bohr model to explain how an atom emits a specific set of frequencies of light when it is heated or has electric current passed through it

The lowest energy state an atom can be at is called its ground state. When an electron in an atom has absorbed energy it is said to be in an excited state. An excited atom is unstable and tends to rearrange itself to return to its lowest energy state. When this happens, the electrons lose some or all of the excess energy by emitting light. Light is only emitted at certain frequencies, each corresponding to a particular electronic transition within the allowed states.

Sorry i dont understand the question can you rephase it?