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Modern Physics – Photon Solved Problems

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This document contains detailed solved problems on photons from modern physics. It explains and applies concepts such as photon energy, photoelectric effect, Compton scattering, and wave-particle duality with step-by-step solutions. The material is ideal for students preparing for assignments, exams, and competitive tests in physics. Perfect for high school, college, and university-level learners who want to strengthen their understanding of the quantum nature of light and photons.

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MODERN PHYSICS
PRESENTER: MUHAMMAD ALI

,F R I E N D S P H Y S I C S

, F R I E N D S P H Y S I C S

THINGS TO STUDY
ELECTROMAGNETIC SPECTRUM
CONCEPT OF PHOTON
ENERGY OF PHOTON AND MOMENTUM OF PHOTON
NUMBER OF PHOTONS IN A BEAM OF LIGHT
NUMBER OF PHOTONS PER SECOND FROM A BULB OF POWER P
BULB POWER EFFICIENCY
INTENSITY AND POWER RELATION
PHOTO ELECTRIC EFFECT
COMPTON EFFECT
PAIR PRODUCTION

, F R I E N D S P H Y S I C S

MOTIVATION

◦A 5W bulb is 80% efficient, it emits all
wavelengths from visible region of
spectrum, calculate the number of photo
per second of 620nm wavelength from t
bulb.
(MDCAT2019)

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Institution: Fbise college
Course: Phy092

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Uploaded on: September 25, 2025
Number of pages: 54
Written in: 2025/2026
Type: Class notes
Professor(s): Muhammad ali
Contains: Second year

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modern physics photon photon energy photoelectr

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Modern Physics – Photon Solved Problems

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