Photons of wavelength 248 nm fall on a metal surface whose work function is 2.2 eV . Assume that each photoelectron inside the metal lattice may come out of the surface orcollide with the lattice befo

Question

Photons of wavelength 248 nm fall on a metal surface whose work function is 2.2 eV . Assume that each photoelectron inside the metal lattice may come out of the surface orcollide with the lattice before coming out. In each collision with the lattice, it loses 20% of its existing energy. Which of the following can be a kinetic energy of an ejected photoelectron?

TestHub · Accepted Answer

E = 248 1240 ​ e V ​ E 1 ​ = 5 − 2.2 = 2.8 e V E 2 ​ = 5 × 0.8 − 2.2 = 1.8 e V E 3 ​ = 5 × 0.82 − 2.2 = 1 e V E 4 ​ = 5 × 0.83 − 2.5 = 0.36 e V ​

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Options:(select one or more)

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