Electron emission: thermionic, field and photoelectric
Photoelectric effect · Physics
Bohr atom
Interactive 3DElectrons orbit the nucleus in shells — switch element to see H, He and Li fill their shells.
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Study notes
Light of wavelength 400 nm falls on a metal with work function 2.0 eV. Find max KE of emitted electrons. Step 1: Photon energy E = hc/λ = 1240/400 = 3.1 eV Step 2: KEmax = hν - W = 3.1 - 2.0 = 1.1 eV Step 3: In joules: 1.1 × 1.6×10⁻¹⁹ = 1.76×10⁻¹⁹ J