the work function of a photosensitive material is equal to 1.8eV, find out threshold frequency and threshold wavelength
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Answer:
01.8eV=1.8×1.6×10−19J,
λ=5000Å =5000×10−10m
Threshold frequency,
v0=ϕ0h=1.8×1.6×10−196.63×10−34=
= 4.363×1014Hz
Threshold wavelength,
λ0=cv0=3×1084.363×1014
=6.875×10−7m
Hope it helps u !!
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