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A 4.0 eV photon hits a metal of work function 2.5 eV. What is Kmax?
A4.0 eV
B6.5 eV
C1.5 eV
D2.5 eV
Answer & Solution
Correct answer: C. 1.5 eV
Kmax = hν minus φ0 = 4.0 eV minus 2.5 eV = 1.5 eV.
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