GATE EC 2014 Set 4 — Question 20
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Electronic Devices → Optoelectronic Devices → Energy Bands
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Question
The cut-off wavelength (in m) of light that can be used for intrinsic excitation of a semiconductor material of bandgap eV is ________
Correct answer
1.12 to 1.14
Solution
The cut-off wavelength for intrinsic excitation is given by the relation between energy and wavelength:Using the standard value for :The official GATE answer key provides a range of 1.12 to 1.14.
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