Waves which can only travel through a medium are called mechanical waves. Which one of the following is not a mechanical wave?
لہریں جو صرف ایک میڈیم کے ذریعے سفر کرسکتی ہیں انہیں مکینیکل لہریں کہتے ہیں۔ مندرجہ ذیل میں سے کون سا مکینیکل لہر نہیں ہے؟
Answer: Infra-red wave
Explanation
Infra-red waves are electromagnetic waves and do not require a medium to travel.
Mechanical waves like water, sound, and seismic waves need a medium (solid, liquid, or gas) to propagate.
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