Question

Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800. Calculate the threhold frequency and work function

Answer 1

Answer:

c = νλ∴ νo = c/λo = 3.0×108 ms-1/6800×10-10 m = 4.14×1014 s-1Work function (wo) = hνo = 6.626×10-34 Js×4.14×1014 s-1 = 2.92×10-19 J

Answer 2

Please refer to the above attachment.