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Photoelectric effect is the emission of electrons when light hits a material. It demonstrates light's particle nature and is used in photodiodes and image sensors.
Формула
The calculator applies KE_max = hf - φ
Пошаговое руководство
- 1Enter photon frequency and material's work function
- 2The calculator applies KE_max = hf - φ
- 3Results show maximum electron kinetic energy
Решённые примеры
Ввод
f = 6 × 10¹⁴ Hz, φ = 2 eV
Результат
KE_max = 2.48 - 2 = 0.48 eV
Using h = 4.136 × 10⁻¹⁵ eV·s
Распространённые ошибки
- ✕Confusing frequency with wavelength in calculations
- ✕Thinking intensity affects electron kinetic energy
Часто задаваемые вопросы
Why doesn't classical physics explain photoelectric effect?
Classical theory predicts increasing light intensity increases electron kinetic energy, but it doesn't—frequency alone matters.
What's threshold frequency?
Minimum frequency for electron emission: f_threshold = φ/h; below this, no emission regardless of intensity.
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