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Grade 12th passModern Physics

A photon of 6eV is incident on a metal surface and the emitted electron is stopped by a retarding potential of -5eV .What will be the work function of the metal??

Profile image of ANMOL SETH
11 Years agoGrade 12th pass
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2 Answers

Profile image of Abhishek Kumar
ApprovedApproved Tutor Answer11 Years ago
As the electron is stopped by -5eV,
KE = 5eV
So, Work function of the metal = 6eV – 5eV = 1eV
Profile image of Anish Bhusal
10 Years ago
 
By einstein’s photoelectric eqn, 
Work function= incident energy – retarding potential 
So, workfunction= 1eV
 
 

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