Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

In hydrogen atom, when electron jumps from second to first orbit, then energy emitted is

Options:

-13.6 eV

-27.2 eV

-6.8 eV

None of these

Correct Answer:

None of these

Explanation:

$E_{n_1 \rightarrow n_2}=-13.6\left[\frac{1}{n_2^2}-\frac{1}{n_1^2}\right] ; n_1=2 ~\&~ n_2=1$

$\Rightarrow E_{I I} \rightarrow E_I=-13.6 \times \frac{3}{4}=-10.2 ~eV$