The transition of electron in hydrogen atom from $3^{ ext {rd }}$ to first orbit is $\lambda$. Then

Question

The transition of electron in hydrogen atom from $3^{	ext {rd }}$ to first orbit is $\lambda$. Then the wavelength of photon emitted due to transition of electron from fourth orbit to second orbit is\

Professor PC Thomas Classes · Answer

$\lambda=\frac{9}{8} \mathrm{R}$\ $\lambda^{\prime}=\frac{16}{3} R=\frac{128}{27} \lambda$\