A metal has work function 0 = 3.80 e V; Two different Light sources Shine on the

Question

A metal has work function 0 = 3.80 e V; Two different Light sources Shine on the metal in separate experiments. Light Has lambda = 260 nm, B has lambda = 420 nm. a) Which Light is ABC to Eject eletrons from the metal? b. Using The light source that is age to eject electrons, Find momentum of Ejected electrons. c) Find Largest wavelength. d. In a separate compound experiment, Appr Incident X ray Photons of wavelength 0.0029 ohm scatter From from electrons, Photons are measured to scatter At 52.0 degree Relative to direction of incident x ray Photon, Find energy 8F scattered Photons (In mer)

Explanation / Answer

given work function as 3.8eV

cutoff wavelength

is

hc/wavelength = 3.8eV

cutoff wavelength = 326.44 nm

a)

only light with 280nm can eject the electrons

b)

maximum wavelength = 326.44nm

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