For three different metals A, B, C photo-emission is observed one by one and Maximum kinetic energy (K) versus frequency (v) of incident light graphs are plotted. Which fig. represents the curves correctly:
Correct answer: D. Option D
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
After the threshold frequency (K.E)e ∝ Frequency of incident light. The graph should be a straight line: In the photoelectric effect, the maximum kinetic energy (K) of emitted photoelectrons is directly proportional to the frequency (v) of the incident light.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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