Asked by Theresa
When light of wavelength 130 nm falls on a cobalt surface, electrons having a maximum kinetic energy of 4.55 eV are emitted. Find values for the following.
(a) the work function of cobalt (in eV)
(b) the cutoff wavelength (in nm)
(c) the frequency corresponding to the cutoff wavelength (in Hz)
(a) the work function of cobalt (in eV)
(b) the cutoff wavelength (in nm)
(c) the frequency corresponding to the cutoff wavelength (in Hz)
Answers
Answered by
bobpursley
KE emitted=workfunction+incomingenergy
incomingenergy= Plancksconstant(c/lambda)
solve for work function
cutoff wavlength
c/lambdacutoff= work function
incomingenergy= Plancksconstant(c/lambda)
solve for work function
cutoff wavlength
c/lambdacutoff= work function
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