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MHT CET 2026 Physics question

PhysicsDual Nature of Matter and RadiationMHT CET 2026

When a metallic surface is illuminated with a radiation of wavelength '', the stopping potential is 'V' the same surface is illuminated with radiation of wavelength , the stopping potential is . The threshold wavelength for the surface is

Answer: (C)

Solution

Einstein's equation: . Case 1: . Case 2: . Dividing (1) by (2): \dfrac{\frac{1}{λ} - \frac{1}{λ_0}}Extra open brace or missing close brace{\frac{1}{6λ}$ -

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Question ID VK-098435