COMPUTER FUNDAMENTALS

COMPUTER PERIPHERALS

MOBILE DEVICES AND SMARTPHONES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Radio waves form a part of the electromagnetic (EMF) spectrum. What else does?
A
Ordinary light
B
A light bulb
C
Mobile phone towers
D
Fibre cables
Explanation: 

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.

There is 1 question to complete.