Question

What is the ratio of wavelength of radiations emitted when an electron in hydrogen atom jump from fourth orbit to second orbit and from third orbit to second orbit.

• A. 27 : 25
• B. 20 : 27
• C. 20 : 25
• D. 25 : 27

Answer 1

Answer: (B)

20 : 27

Answer 2

By using $\frac{1}{\lambda} = R\left\lbrack \frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}} \right\rbrack$