Class 12 Physics simulations · Dual Nature of Radiation and Matter

Photoelectric effect

Shine light on a metal and see whether it releases electrons.

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What to notice

Below the threshold frequency, brighter light still cannot eject electrons.

Key relation

Kₘₐₓ = hf − φ

Try this

Use a long wavelength with maximum intensity, then shorten the wavelength.

What you can change

• Light wavelength: 250 to 700 nm
• Work function: 1.5 to 4.5 eV
• Light intensity: 10 to 100 %

More in Dual Nature of Radiation and Matter

• Compton scattering
• Matter-wave wavelength
• Electron diffraction from a crystal
• Photocell current vs anode voltage
• Stopping potential vs frequency

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