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MHT CET 2026 Physics question

PhysicsDual Nature of Matter and RadiationMHT CET 2026

When light of wavelengths '' incident on a photosensitive surface, the stopping potential is 'V'. When a light of wavelength 1.5 is incident on the same surface, the stopping potential is ''. Threshold wavelength for the surface is

Answer: (D)

Solution

Einstein's equation: . Let and . Case 1: . Case 2: . Subtracting: , so $eV =

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Question ID VK-100849