Photoelectric کا حساب کیسے لگائیں
Photoelectric کیا ہے؟
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.
فارمولا
The calculator applies KE_max = hf - φ
مرحلہ وار گائیڈ
- 1Enter photon frequency and material's work function
- 2The calculator applies KE_max = hf - φ
- 3Results show maximum electron kinetic energy
حل شدہ مثالیں
ان پٹ
f = 6 × 10¹⁴ Hz, φ = 2 eV
نتیجہ
KE_max = 2.48 - 2 = 0.48 eV
Using h = 4.136 × 10⁻¹⁵ eV·s
عام غلطیاں جن سے بچنا ہے
- ✕Confusing frequency with wavelength in calculations
- ✕Thinking intensity affects electron kinetic energy
اکثر پوچھے جانے والے سوالات
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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