Which one of the following is NOT an electromagnetic wave ?

[amp_mcq option1=”Light wave” option2=”Radio wave” option3=”Sound wave” option4=”Micro wave” correct=”option3″]

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UPSC CAPF – 2019

Sound waves are mechanical waves that require a medium (like air, water, or solids) to propagate. They are typically longitudinal waves in fluids.

– Electromagnetic waves are disturbances that can travel through a vacuum (like space) as well as through matter. They consist of oscillating electric and magnetic fields.
– Light waves, radio waves, and microwaves are all examples of electromagnetic waves, differing in their frequency and wavelength.

– The electromagnetic spectrum includes, in order of increasing frequency/energy and decreasing wavelength: Radio waves, Microwaves, Infrared radiation, Visible light, Ultraviolet radiation, X-rays, and Gamma rays.
– Sound waves are caused by vibrations that create pressure variations in the medium.

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