Stoyanovahvsbh

## Answered question

2022-05-17

Which line in the Balmer series is the first one in the UV part of the spectrum?

### Answer & Explanation

lavintisqpsnb

Beginner2022-05-18Added 10 answers

To determine:
The line in Balmer series which is the first one in the UV part of the spectrum.
Formula used:
$\frac{1}{\lambda }={R}_{H}\left(\frac{1}{{n}_{1}^{2}}-\frac{1}{{n}_{2}^{2}}\right)$
Here, ${R}_{H}$ is the Rydberg constant.
Its value is $=1.097×{10}^{7}$
Wavelength will be highest for first line.
So, $\lambda =380×{10}^{-9}$
Using formula:
$\frac{1}{380×{10}^{-9}×1.097×{10}^{7}}=\left(\frac{1}{{2}^{2}}-\frac{1}{{n}_{2}^{2}}\right)\phantom{\rule{0ex}{0ex}}\frac{1}{{n}^{2}}=\frac{1}{4}-\frac{1}{419.86×{10}^{-2}}\phantom{\rule{0ex}{0ex}}{n}_{2}\approx 10$
Answer: The line in Balmer series which is the first one in the UV part of the spectrum is 10

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