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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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- Time taken by light to cross a glass slab of thickness 4 mm and refractive index 3 is
- In communication with help of antenna if height is doubled then the range
- A magnifying glass of focal length 5 cm is used to view an object by a person
- A geostationary satellite is orbiting the earth at a height of 5R above that surface
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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