Скачать или смотреть 📸 Photoelectric Effect – Class 12 Physics

📸 Photoelectric Effect – Class 12 Physics
📸 Photoelectric Effect – Class 12 Physics

Definition: The photoelectric effect is the emission of electrons from a metal surface when light of a suitable frequency falls on it.


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⚙️ Key Concepts:

1. Photoelectrons – Electrons emitted due to photoelectric effect.


2. Threshold Frequency (ν₀) – Minimum frequency of incident light needed to emit electrons.


3. Work Function (Φ) – Minimum energy required to eject an electron from the metal surface.

Φ = hν₀



4. Einstein’s Photoelectric Equation:
K.Eₘₐₓ = hν − Φ
Where:

h = Planck’s constant

ν = Frequency of incident light

Φ = Work function

K.Eₘₐₓ = Maximum kinetic energy of emitted electrons