AIPMT MAINS2011Physics-Modern Physics
AIPMT MAINS 2011 Physics Hydrogen Spectrum MCQ Question
Type: MCQ-numerical-Hard-Class 12
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 2.75 eV. If the stopping potential of the photoelectron is 10 V, then the value of n is
A
5
B
2
C
3
D
4
Correct Answer
Option D
Detailed Explanation
Using the energy conservation equation for the hydrogen atom and photoelectric effect, the value of n is calculated to be 4.
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