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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.
공식
The calculator applies KE_max = hf - φ
단계별 가이드
- 1Enter photon frequency and material's work function
- 2The calculator applies KE_max = hf - φ
- 3Results show maximum electron kinetic energy
풀어진 예시
입력
f = 6 × 10¹⁴ Hz, φ = 2 eV
결과
KE_max = 2.48 - 2 = 0.48 eV
Using h = 4.136 × 10⁻¹⁵ eV·s
피해야 할 일반적인 실수
- ✕Confusing frequency with wavelength in calculations
- ✕Thinking intensity affects electron kinetic energy
자주 묻는 질문
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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