Nuclear Physics and RadioactivityHard
Question
The stopping potential for photo electron emitted from a metal surface of work function 1.7 eV is 10.4V. Select correct choice
Options
A.The wavelength of light used is 1022 
B.The wavelength of light used is 970
C.The light used is emitted by hydrogen gas sample which de-excites from n = 3 to n = 1
D.The light used is emitted by hydrogen gas sample which de-excites from n = 4 to n = 1
Solution
Kmax 10.4eV ; 
= 1.7 eV
E = 10.4 + 1.7 = 12.1 eV ⇒ n = 3 to n = 1
12.1 =
= 1.7 eVE = 10.4 + 1.7 = 12.1 eV ⇒ n = 3 to n = 1
12.1 =
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