Modern Physics
Photoelectric Effect
Maximum kinetic energy of ejected electrons equals photon energy minus the work function.
Variables
K_{max}J
Maximum kinetic energy of electron
hJ·s
Planck constant
fHz
Frequency of light
\phiJ
Work function
Derivation
Explained by Einstein using photon concept, earning him the Nobel Prize.
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Common questions
What is the Photoelectric Effect formula?
Photoelectric Effect is written Kₘₐₓ = hf - φ. Maximum kinetic energy of ejected electrons equals photon energy minus the work function. It belongs to Modern Physics, under Quantum Mechanics.
What are the units in Kₘₐₓ = hf - φ?
In SI units, K_{max} is maximum kinetic energy of electron, measured in J; h is planck constant, measured in J·s; f is frequency of light, measured in Hz; \phi is work function, measured in J.
How is the Photoelectric Effect formula derived?
Explained by Einstein using photon concept, earning him the Nobel Prize. The result is Kₘₐₓ = hf - φ.