Single Choice

The wavelength of an electron for transition from a state $$n_{1}$$ to $$n_{2}$$ is $$\displaystyle\frac{9}{8R}$$. Which of the following wavelengths is possible for a transition from $$n_{2}$$ to $$n_{1}$$

A$$\displaystyle\frac{16}{15R}$$
B$$\displaystyle\frac{4}{3R}$$
C$$\displaystyle\frac{9}{8R}$$
Correct Answer
D$$\displaystyle\frac{36}{5R}$$

Solution

equal amount of energy is required to excite an electron to higher level and when it come back from higher to lower level

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