Light of wavelength 500 nm is incident on a met li with work function 2 28 eV The de Broglie wavelength of the emitted electron

Question

Light of wavelength 500 nm is incident on a met li with work function 2 28 eV The de Broglie wavelength of the emitted electron is 1 2 8 x 10 2m 2 2 8 x 10 10m 3 2 8 x 10 m 4 2 8 x 10 9 m A photoelectric surface is illuminated successively by of unuglength and 2 2 If the

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