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JEE Main 2022 Physics question

PhysicsDual Nature of Matter and RadiationJEE Main 2022

A parallel beam of light of wavelength 900 nm and intensity 100 is incident on a surface perpendicular to the beam. The number of photons crossing 1 area perpendicular to the beam in one second is

Answer: (2)

Solution

The power through 1 is W. The number of photons per second is $Pλ

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Question ID VK-025107