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An LED is constructed from a p-n junction based on a certain semi-conducting material whose energy gap is 1.9 eV. Then, the wavelength of the emitted light is
Options
(a) 6.5×10⁻⁷ m
(b) 2.9×10⁻⁹ m
(c) 9.1×10⁻⁵ m
(d) 1.6×10⁻⁸ m
Correct Answer:
6.5×10⁻⁷ m
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An explosion blows a rock into three parts. Two parts go off at right angles to each other
- In Young’s double slit experiment, the locus of the point P lying in a plane
- Excitation energy of a hydrogen like ion, in its first excitation state, is 40.8 eV.
- A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively
- 24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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