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Einstein Photoelectric Theory
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Einstein's Photoelectric Equation
At the threshold frequency, kinetic energy = 0, then
Work function
The minimum energy required for a photoelectron to be emitted from a metal surface
Work function equation
Threshold frequency
The minimum frequency for a light photon to produce photoelectric effect
The work function of cesium
2.14 electron volt
The work function of lithium
2.14 electron volt
Maximum wavelength of cesium to produce photoelectric current
579 nm
Maximum wavelength of lithium to produce photoelectric current
496 nm
Applications of photoelectric effect
1. Solar panel 2. Light detectors at the automatic doors 3. The image sensor in high-resolution cameras
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