Question

A monochromatic radiation of wave length $\lambda$ is incident on a hydrogen sample in ground state. The sample subsequently emits radiation of six different wave lengths, then the value of $\lambda$ is [Use $ch = 1242\text{ eV-nm}$]

• A. 80 nm
• B. 85.5 nm
• C. 97.4 nm
• D. 100.2 nm

Hint:

Number of lines $6 \rightarrow n=4$; energy required is approximately 12.75 eV.

Answer 1

The Correct Option is C