JEE Advanced 2016 Physics question
In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength () of incident light and the corresponding stopping potential () are given below :
Given that and C, Planck's constant (in units of J s) found from such an experiment is
Answer: (B)
Solution
Einstein's equation: . Subtracting the equations for two wavelengths removes : . Using m and m:
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account