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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.
ସୂତ୍ର
The calculator applies KE_max = hf - φ
ଷ୍ଟେପ୍-ଷ୍ଟେପ୍ ଗାଇଡ୍ |
- 1Enter photon frequency and material's work function
- 2The calculator applies KE_max = hf - φ
- 3Results show maximum electron kinetic energy
ସମାଧାନ ହୋଇଥିବା ଉଦାହରଣ
ଇନପୁଟ୍
f = 6 × 10¹⁴ Hz, φ = 2 eV
ଫଳ
KE_max = 2.48 - 2 = 0.48 eV
Using h = 4.136 × 10⁻¹⁵ eV·s
ଏଡ଼ାଇବା ଯୋଗ୍ୟ ସାଧାରଣ ଭୁଲ
- ✕Confusing frequency with wavelength in calculations
- ✕Thinking intensity affects electron kinetic energy
ବାରମ୍ବାର ଜିଜ୍ଞାସା
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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