alleryIn the photoelectric effect, the kinetic energy of ejected electrons is:
AEqual to the work function φ
BEqual to hν (the photon energy)
CKE_max = hν − φ (Einstein's equation)
DIndependent of light frequency
Answer & Solution
Correct answer: C. KE_max = hν − φ (Einstein's equation)
**Einstein's photoelectric equation:** KE_max = hν − φ.
Photon energy hν minus work function φ gives the maximum kinetic energy of the ejected electron.
Below threshold frequency, no emission.
Got Einstein the 1921 Nobel.
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