Assertion : Balmer series lies in the visible | vedclass

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(A) The wavelength for the Balmer series is given by the Rydberg formula: $\frac{1}{\lambda} = R \left[ \frac{1}{2^2} - \frac{1}{n^2} \right]$,where $

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

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(A) The wavelength for the Balmer series is given by the Rydberg formula: $\frac{1}{\lambda} = R \left[ \frac{1}{2^2} - \frac{1}{n^2} ight]$,where $n = 3, 4, 5, \dots$For the maximum wavelength $(n=3)$:$\frac{1}{\lambda_{\max}} = R \left[ \frac{1}{4} - \frac{1}{9} ight] = R \left[ \frac{5}{36} ight]$$\lambda_{\max} = \frac{36}{5R} \approx 6563 \, \mathring{A}$For the minimum wavelength $(n 	o \infty)$:$\frac{1}{\lambda_{\min}} = R \left[ \frac{1}{4} - 0 ight] = \frac{R}{4}$$\lambda_{\min} = \frac{4}{R} \approx 3646 \, \mathring{A}$The range $3646 \, \mathring{A}$ to $6563 \, \mathring{A}$ falls within the visible region of the electromagnetic spectrum. Thus,both the Assertion and the Reason are correct,and the Reason correctly explains the Assertion.

Assertion : Balmer series lies in the visible region of the electromagnetic spectrum.
Reason : $\frac{1}{\lambda} = R \left[ \frac{1}{2^2} - \frac{1}{n^2} \right]$,where $n = 3, 4, 5, \dots$

Similar Questions

Write the Balmer formula in terms of the frequency of light.

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Assertion : Balmer series lies in the visible region of the electromagnetic spectrum.Reason : $\frac{1}{\lambda} = R \left[ \frac{1}{2^2} - \frac{1}{n^2} \right]$,where $n = 3, 4, 5, \dots$