Practicing Success
Practicing Success
CUET Preparation Today
An electron in a hydrogen atom is in the third excited state. It returns to the ground state by emitting photons. How many different photon wavelengths are possible? |
9 6 3 2 |
6 |
Number of wavelength are $\frac{n(n-1)}{2} = \frac{4\times 3}{2} = 6$ |
