COMPUTER PERIPHERALS
MOBILE DEVICES AND SMARTPHONES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ordinary light
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A light bulb
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Mobile phone towers
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Fibre cables
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Detailed explanation-1: -In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves. Microwaves (like the ones used in microwave ovens) are a subsection of the radio wave segment of the EM spectrum.
Detailed explanation-2: -Radio and microwaves are usually described in terms of frequency (Hertz), infrared and visible light in terms of wavelength (meters), and x-rays and gamma rays in terms of energy (electron volts).
Detailed explanation-3: -WHAT ARE RADIO WAVES? Radio waves have the longest wavelengths in the electromagnetic spectrum. They range from the length of a football to larger than our planet. Heinrich Hertz proved the existence of radio waves in the late 1880s.