Which one of the following waves does not belong to the category of the other three ?
[amp_mcq option1=”X-rays” option2=”Microwaves” option3=”Radio waves” option4=”Sound waves” correct=”option4″]
This question was previously asked in
UPSC NDA-2 – 2017
The correct answer is Sound waves.
X-rays, microwaves, and radio waves are all forms of electromagnetic waves. They are part of the electromagnetic spectrum, travel at the speed of light in a vacuum, and do not require a medium for propagation. Sound waves, on the other hand, are mechanical waves. They are vibrations that travel through a medium (like air, water, or solids) and require a medium to propagate.