Physics Waves UHS 2022
PMDC Verified Question 61 of 125
The mechanical waves are not by:
A
Electric and magnetic fields
B
Coil of springs
C
Ropes
D
Water
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Electric and magnetic fields
Concept:

Waves are primarily divided into two main categories: Mechanical and Electromagnetic.

Solution:

  • Mechanical waves obligatorily require a physical, material medium to propagate (such as water, steel, air, ropes, or springs).


  • Electric and magnetic fields oscillate to form Electromagnetic (EM) waves (like light or radio waves).


  • EM waves are uniquely non-mechanical because they can self-propagate through a pure vacuum without any physical medium.


Why other options are incorrect:

Springs, ropes, and water are all tangible physical media; any wave propagating through them is strictly classified as a mechanical wave.

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