Class 12 Physics simulations · Dual Nature of Radiation and Matter

Electron diffraction from a crystal

Change electron energy and locate the first-order Bragg reflection.

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What to notice

Faster electrons have shorter de Broglie wavelengths and smaller Bragg angles at fixed crystal spacing.

Key relation

2d sinθ = λ; λ = h/√(2meV)

Try this

Quadruple voltage and compare the wavelength and diffraction angle.

What you can change

• Accelerating voltage: 50 to 300 V
• Crystal plane spacing: 0.09 to 0.25 nm

More in Dual Nature of Radiation and Matter

• Compton scattering
• Matter-wave wavelength
• Photocell current vs anode voltage
• Photoelectric effect
• Stopping potential vs frequency

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