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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
- The current through an inductor changes from 3 A to 2 A is 1 m/s. If induced e.m.f.
- Two metal spheres of radii 0.01m and 0.02m are given a charge of 15mC and 45mC
- A microscope is having objective of focal length 1 cm and eye-piece of focal length 6 cm.
- If the dipole moment of a short bar magnet is 1.25 A-m², the magnetic field on its
- An alternating voltage given as, V=100√2 sin100t V is applied to a capacitor
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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