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Wave Optics

Question

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The shortest wavelength in the Lyman Series is 911.6 Å. Then the longest wavelength in the Lyman's series will be?

Solution

Given, shortest wavelength in the lyman series = 911.6

\overset{0}{A}

For the Lyman Series,

we have

\frac{λ_{L}}{λ_{s}} = \frac{4}{3}

Hence,

λ_{L} = \frac{4}{3} \times λ_{S}

\Rightarrow

λ_{L} = \frac{4}{3} \times 911.6 Å

= 1215 Å

, will be the longest wavelength in the lyman series.

Some More Questions From Wave Optics Chapter

Answer the following questions, which help you understand the difference between Thomson's model and Rutherford's model better.
Is the probability of backward scattering (i.e., scattering of α-particles at angles greater than 90°) predicted by Thomson's model much less, about the same, or much greater than that predicted by Rutherford's model?

Answer the following questions, which help you understand the difference between Thomson's model and Rutherford's model better.
Keeping other factors fixed, it is found experimentally that for small thickness t, the number of α-particles scattered at moderate angles is proportional to t. What clue does this linear dependence on t provide?

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