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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
- A Gaussian surface in the cylinder of cross-section πa² and length L is immersed
- A system consists of three masses m₁, m₂ and m₃ connected by a string passing
- Find out the e.m.f. produced when the current changes from 0 to 1 A in 10 sec.
- The charge flowing through a resistance R varies with time t as Q=at-bt²,
- Two identical capacitors are first connected in series and then in parallel.
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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