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TV remote control used ultra violet light.

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in Analog Communications by (122k points)
TV remote control used ultra violet light.

(a) True

(b) False

This question was posed to me in unit test.

Enquiry is from Linear Modulation topic in chapter Amplitude Modulation of Analog Communications

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Correct option is (b) False

To elaborate: The infrared (IR) and the ultraviolet(UV) rays represent the two extremities of the visible spectrum (400-700nm). While IR represents electromagnetic radiation with wavelengths longer than those of visible light, UV represents wavelengths shorter than visible light. Each time we press any button of TV remote, it sends a beam of infrared rays. For different commands, it sends out different beams that are detected by a microchip lying inside TV.

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