Photons & Photoelectric effect - 2 | Early Quantum Theory
The minimum energy E required to eject electrons from silver is 412 kJ.mol-1.
Find the longest wavelength of electromagnetic radiation that can eject an electron.
Ek = hν - hν0 (photoelectric effect)
At the longest wavelength that can eject an electron: ν = ν0
E0 = hν0 where E0 is the minimum energy to eject one electron from silver (in J).
E0 = = = 6.84 x 10-19 J.
E0 = hν0 =
⇒ λ0 = where λ0 is the longest wavelength that can eject an electron.
⇒ λ0 = 291 nm