Cum se calculează Photoelectric
Ce este Photoelectric?
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.
Formulă
The calculator applies KE_max = hf - φ
Ghid pas cu pas
- 1Enter photon frequency and material's work function
- 2The calculator applies KE_max = hf - φ
- 3Results show maximum electron kinetic energy
Exemple rezolvate
Intrare
f = 6 × 10¹⁴ Hz, φ = 2 eV
Rezultat
KE_max = 2.48 - 2 = 0.48 eV
Using h = 4.136 × 10⁻¹⁵ eV·s
Greșeli frecvente de evitat
- ✕Confusing frequency with wavelength in calculations
- ✕Thinking intensity affects electron kinetic energy
Întrebări frecvente
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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