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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 proton is moving in a uniform magnetic field B in a circular path of radius a
- Water falls from a height of 60m at the rate of 15 kg/s to operate a turbine
- A current I ampere flows along the inner conductor of a co-axial cable and returns
- Consider 3rd orbit of He⁺(helium), using non-relativistic approach, the speed
- The focal length of the objective of a terrestrial telescope is 80 cm
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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