Question

# An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photosensitive material having work function . If the stopping potential of the photoelectron is , then the value of  is :-

A
B
C
D
Medium

## Solution

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Correct option is B)

## Differenced of 4 and 1 energy level is 12.75 eV  So higher energy level is 4 to ground and Excited state is

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