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The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying the voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal

The ejection of the photoelectron from the silver metal in the photoelectric effect experiment can be stopped by applying the voltage of 0.35 V when the radiation 256.7 nm is used. Calculate the work function for silver metal

Grade:12

3 Answers

Gaurav
askIITians Faculty 164 Points
9 years ago
Hello Student
255-1758_images.jpg
Arman singh grewal
22 Points
6 years ago
Sir, u have a slight mistake here,Its work function is 7.18 × 10 raised to power -19 J not the one you listed. Rest of question is fine
Kushagra Madhukar
askIITians Faculty 628 Points
3 years ago
Dear student,
Please find the solution to your problem.
 
KE = 0.35 eV = 0.35 x 1.6 x 10-19 J
= 0.56 x 10-19 J
 
Now, hv = hc/λ = 6.626 x 10-34 x 3 x 108/256.7 x 10-9 = 7.74 x 10-19 J
we know, hv = Wo + KE
Hence, Wo = hv – KE
= 7.74 x 10-19 – 0.56 x 10-19
= 7.18 x 10-19 J
 
Thanks and regards,
Kushagra

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