GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
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X-rays
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visible light
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radio waves
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ultraviolet light
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Explanation:
Detailed explanation-1: -The correct answer is D. The ‘light-emitting diode’ is used in electronic devices. The light-emitting diode (light-emitting diode) is a ‘semiconductor diode’. It emits light when currents flow in LEDs.
Detailed explanation-2: -In a light emitting diode, the recombination of electrons and electron holes in a semiconductor produces light (be it infrared, visible or UV), a process called “electroluminescence". The wavelength of the light depends on the energy band gap of the semiconductors used.
Detailed explanation-3: -An IR LED (infrared light emitting diode) is a solid state lighting (SSL) device that emits light in the infrared range of the electromagnetic radiation spectrum.
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