GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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electric
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magnetic
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digitial
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none of the above
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Detailed explanation-1: -The correct answer is Sound. Electromagnetic waves or EM waves are waves that are produced as a result of vibration between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.
Detailed explanation-2: -Electromagnetic waves are formed when an electric field (which is shown in red arrows) couples with a magnetic field (which is shown in blue arrows). Magnetic and electric fields of an electromagnetic wave are perpendicular to each other and to the direction of the wave.
Detailed explanation-3: -Beta rays are emitted by radioactive elements and are not part of the electromagnetic spectrum.
Detailed explanation-4: -Some waves are not electromagnetic in nature, like, Ultrasonic wave, Sound wave, Alpha rays, beta rays, Cathode rays and Canal rays.