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NEET 2010 Physics question

PhysicsDual Nature of Matter and RadiationNEET 2010

When monochromatic radiation of intensity falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are and respectively. If the intensity of radiation is , the number of emitted electrons and their maximum kinetic energy are respectively

Answer: (2)

Solution

Intensity is the number of photons per unit area per unit time. Doubling the intensity at the same frequency doubles the number of photons striking the surface, and hence the number of photoelectrons emitted (). By Einstein's equation , the

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Question ID VK-090340