Notes
The Electron: Photoelectric Effect
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Photoelectric Effect
The photoelectric effect is when electrons are emitted from the surface of a metal due to electromagnetic radiation hitting the metal
It is the opposite of the X-ray effect
Photons
Bundles of light energy
E = hf
E = energy of the photon
h = Planck's constant
f = frequency of the electromagnetic wave
Einstein's Photoelectric Law
The energy of the faster electron emitted is the difference between the energy of the photon and the work function of the metal
hf = ϕ + 1/2(m)(vmax)²
h = Planck's constant
f = frequency of the electromagnetic wave
ϕ = work function of the metal
m = mass of an electron
vmax = maximum velocity of any of the emitted electrons
In this picture the red wavy line signifies electromagnetic radiation hitting the surface of a metal. This causes electrons to be emitted from the surface
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- This note covers the phenomenon of the photoelectric effect, photons and Einstein's photoelectric law. It is ideally used alongside the mind map on the electron and the notes on x-rays and thermionic emission.
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