Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Medium-Class 12
Calculate the wavelength of light needed to eject electrons from a metal surface if the work function of the metal is 2.14 eV and the stopping potential is 0.60 eV.
A
454 nm
B
500 nm
C
600 nm
D
350 nm
Correct Answer
Option A
Detailed Explanation
Using the formula λ = hc/(eV₀ + φ), where φ = 2.14 eV and eV₀ = 0.60 eV, we find λ = 454 nm. The calculation is based on the given NCERT context.
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