Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Atoms

Question:

The Rydberg constant R for hydrogen is

Options:

$R=-\left(\frac{1}{4 \pi \varepsilon_0}\right) . \frac{2 \pi^2 m e^2}{ch^2}$

$R=\left(\frac{1}{4 \pi \varepsilon_0}\right) . \frac{2 \pi^2 m e^4}{c h^2}$

$R=\left(\frac{1}{4 \pi \varepsilon_0}\right)^2 . \frac{2 \pi^2 m e^4}{c^2 h^2}$

$R=\left(\frac{1}{4 \pi \varepsilon_0}\right)^2 . \frac{2 \pi^2 m e^4}{c h^3}$

Correct Answer:

$R=\left(\frac{1}{4 \pi \varepsilon_0}\right)^2 . \frac{2 \pi^2 m e^4}{c h^3}$

Explanation:

$R=\frac{2 \pi^2 k^2 e^4 m}{c h^3}=\left(\frac{1}{4 \pi \varepsilon_0}\right)^2 \frac{2 \pi^2 m e^4}{c h^3}$