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Electromagnetic waves can travel and transport energy without a medium through which it may travel. This contrasts with mechanical waves, such as sound waves, which cannot travel through a vacuum. If electromagnetic radi... More »

Waves are vibrations that transfer energy through a medium without causing the individual particles of a medium to move significantly from their equilibrium or position of rest. Once a wave has passed, the particles that... More »

Mechanical waves transfer energy by inducing vibrations in the propagation medium. Electromagnetic waves do not require a medium for propagation, but still transfer energy by having an electric and magnetic field propaga... More »

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The spectrum of electromagnetic radiation is comprised of waves or particles that carry different amounts of energy. The visible spectrum is what humans and most animals see. The least energetic range of electromagnetic ... More »

Mechanical waves require a medium to travel through so that they can transmit energy. Some examples of mechanical waves are water waves, sound waves and the waves of a slinky or jump rope. The medium through which a mech... More »

Mechanical waves transfer energy by inducing vibrations in the propagation medium. Electromagnetic waves do not require a medium for propagation, but still transfer energy by having an electric and magnetic field propaga... More »

According to the Encyclopedia Britannica, in terms of classical theory, electromagnetic radiation refers to energy that flows at the universal speed of light via free space or a material medium in the form of electric an... More »