Determine the max wavelength in nm necessary to liberate an electron from a metal with Work...

Question

Question

Determine the max wavelength in nm necessary to liberate an electron from a metal with Work Function W=2.468 eV

science physics

Answer 1

Answer #1

Workfunction of metal

W = 2.468 eV = 2.468 x 1.6 x 10^-19 Joule

For liberating an electron from metal,metal workfunction (W) should be equal to the incident photon energy ( hc/λ).

W = hc / λ

λ = hc / W

λ = ( 6.626 x 10^-34 x 3 x 10⁸ ) / ( 2.468 x 1.6 x 10^-19 ) m

λ = 0.000000502369 m = 502.369 nm

Answer 2

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