Physics Dawn of Modern Physics UHS 2023
PMDC Verified Question 15 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:

The emission of electrons when electromagnetic radiation hits a material is a core quantum phenomenon.

Formula:

N/A

Solution:

  • This is the exact definition of the photoelectric effect.


  • An incoming photon is completely absorbed by an atomic electron. If the photon's energy exceeds the work function of the metal, the electron is violently ejected.


Why other options are incorrect:

The Compton effect involves photon scattering (not complete absorption). Pair production is energy becoming mass. Black body radiation is a thermal emission process.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.