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MHT CET Physics question

PhysicsDual Nature of Matter and RadiationMHT CET

The work function for Al, K and Pt is 4.28 eV, 2.30 eV and 5.65 eV, respectively, Their respective threshold frequencies would be

Answer: (A)

Solution

is proportional to the work function, so with $φ_{Pt} > φ_{Al} >

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Question ID VK-083656