Q.
The work functions of four materials M1,M2,M3 and M4 are 1.9eV,2.5eV,3.6eV, and 4.2eV, respectively. Which of these material is (are) useful in a photocell to detect visible light?
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AMUAMU 2014Dual Nature of Radiation and Matter
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Solution:
The material are useful in a photocell to detect visible light M1 and M2 .