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The work function for caesium atom is l.9eV. Calculate the threshold frequency of the radiation. If the caesium element is irradiated with a wavelength 500 nm
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a
4.588 x 1014
b
5.684 x 1012
c
4.624 x 108
d
5.245 x 1011
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Correct option is A
If threshold frequency =v0 and threshold wavelength =λ0 then, W0=hv0 ∴ v0=W0h=1.9×1.6×10−19J6.626×10−34Js=4.588×1014s−1Talk to our academic expert!
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