What is the frequency of light emitted when an electron in a hydrogen atom jumps from the `3^(rd)` orbit to the `2^nd` orbit ?

Explanation

`E_3-E_2=-21.72xx10^(-19)((1)/(9)-(1)/(4))`
`21.72xx10^(-19)xx(5)/(36)`
`therefore` Difference in energy , `E_3-E_2-3.01xx10^(-19)J`
According to Plank's eqution , `DeltaE=hv`
`3.01xx10^(-19)=6.625 xx10^(-34)v`
Frequency, (v) `=(3.01xx13^(-19))/(6.625xx10^(-34))=4.5xx10^(14-1)s`.