Question

Write Einstein’s photoelectric equation. How did Millikan prove the validity of this equation?

Answer 1

Einstein's photoelectric equation is,

hv − hv₀ = KE

Through a series of experiments, Millikan determined the slope `h/e` of the V₀ → v graph. He derived Planck's constant, h = 6.626 × 10⁻³⁴ J-s, based on slope and electron charge estimates. Millikan successfully proved the photoelectric equation by conducting experiments with various alkali metals and varying incident radiation levels.