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JEE Main 2005 Physics question

PhysicsSemiconductor ElectronicsJEE Main 2005

The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 2480 nm is incident on it. The band gap in (eV) for the semiconductor is

Answer: (3)

Solution

The threshold wavelength corresponds to the band gap: $ =

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Question ID VK-038586