what are the frequency and wave length of light emitted when the electron undergoes transition from an energy level n=4 - Chemistry - Structure of Atom

Question

what are the frequency and wave length of light emitted when the
electron undergoes transition from an energy level n=4 to an energy
level wiyh n=2?

Anuradha Puri · Accepted Answer

For transition from n = 4 to n= 2,

Now,

And,

Hence, frequency =

and wavelength =

what are the frequency and wave length of light emitted when the electron undergoes transition from an energy level n=4 to an energy level wiyh n=2?