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Early Quantum Theory (Photon energy (Photon is emission of light being…
Early Quantum Theory
Photoelectric effect
Instantaneous emission of electrons from a cold metal surface when it is illuminated by electromagnetic radiation of frequency greater than the threshold frequency
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Photon energy
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One photon energy (amount of energy contained in one packet of photon)
E=hf
E= one photon energy (J)
h= Planck's constant, 6.626x10^-34J.s
c=3.0x10^8m/s
λ= wavelength of light
Total photon energy (total amount of energy in a light)
ET= Total photon energy (J)
n= Number of photon
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Applying into circuit
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Stopping potential
The minimum negative potential difference between anode and cathode to just stop the photoelectrons with the maximum kinetic energy from reaching the anode