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de Broglie Wavelength
AP Physics 2 · Unit 15 Modern Physics
Learning Objectives
λ = h/p = h/(mv) for matter waves
Heavier/faster objects → shorter λ
Wave-particle duality of matter
Electrons exhibit measurable wavelengths
Constants
h = 6.626 × 10⁻³⁴ J·s
mₑ = 9.109 × 10⁻³¹ kg
mₚ = 1.673 × 10⁻²⁷ kg
Tags
de Broglie
matter wave
wavelength
AP Physics 2
de Broglie Calculator: λ = h/(mv)
Particle:
Electron (9.109×10⁻³¹ kg)
Proton (1.673×10⁻²⁷ kg)
Neutron (1.675×10⁻²⁷ kg)
Custom mass
Mass (kg):
Velocity (m/s):
e⁻ fast
e⁻ slow
p⁺ thermal
⚾ baseball
🚶 human
Calculate λ