Physics Dawn of Modern Physics UHS 2022
PMDC Verified Question 25 of 52
The process of ejection of loosely bound electrons from a certain photo sensitive surface by absorption of photon is called:
A
Photoelectric effect
B
Compton effect
C
Pair production
D
Black body radiation
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Photoelectric effect
Concept:

When light of sufficient energy strikes a material, it can eject electrons. This phenomenon proves the quantization of light energy.

Formula:

$$ K.E_{max} = hf - \Phi $$

Solution:

  • The direct absorption of a photon leading to the ejection of an electron from a material's surface is definitively known as the photoelectric effect.


Why other options are incorrect:

The Compton effect is the scattering of a photon by a free electron. Pair production is the creation of an electron-positron pair from a high-energy photon. Black body radiation describes continuous thermal emission.

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