(a) The smallest amount of energy needed to eject an electron from metallic sodium is 2 28eV Does sodium show a photoelectric effect for red light, with 680 nm (b) What is the cutoff wavelength for photoelectric emission from sodium (c) To what color does that wavelength correspond

Question: (a) The smallest amount of energy needed to eject an electron from metallic sodium is 2.28eV. Does sodium show a photoelectric effect for red light,

(a) The smallest amount of energy needed to eject an electron from metallic sodium is 2.28eV. Does sodium show a photoelectric effect for red light, with λ = 680 nm?
(b) What is the cutoff wavelength for photoelectric emission from sodium?
(c) To what color does that wavelength correspond?

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