What Makes Light Waves Different from Mechanical Waves?

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SUMMARY

Light waves are classified as transverse waves, distinct from mechanical waves, which require a medium to propagate. Mechanical waves, such as sound waves in air (longitudinal) and waves on water or ropes (transverse), involve oscillation of material particles. In contrast, light waves do not rely on a material medium; instead, they are oscillations of electromagnetic fields. Therefore, while transverse waves are typically mechanical, light waves are non-mechanical transverse waves.

PREREQUISITES
  • Understanding of wave types: transverse and longitudinal
  • Basic knowledge of electromagnetic fields
  • Familiarity with wave propagation concepts
  • Concept of mechanical vs. non-mechanical waves
NEXT STEPS
  • Research the properties of electromagnetic waves
  • Study the differences between mechanical and non-mechanical waves
  • Learn about the behavior of light in different mediums
  • Explore the mathematical representation of wave functions
USEFUL FOR

Students of physics, educators explaining wave mechanics, and anyone interested in the fundamental differences between light and mechanical waves.

Aadrish
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i have a huge problem. the issue is
" light waves are transverse waves . transverse and longitudinal are the example of mechanical waves . while light waves are not mechanical waves"
can some one explain me
 
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Aadrish said:
" light waves are transverse waves . transverse and longitudinal are the example of mechanical waves . while light waves are not mechanical waves"
can some one explain me

"mechanical" means that there's some material that oscillates

in a sound wave in air, each bit of the air moves forwards and backwards in the direction the wave is moving …

that's longitudinal

in a wave on water or on a rope, each bit of the water surface or the rope moves up and down (but does not move in the direction the wave is moving)…

that's transverse

but with light, there's no material to oscillate :wink:

it's the field (non-mechanical) that oscillates up and down​
 
so why light waves are transverse as we know that transverse waves are mechanical waves so why we deal light as mechanical wave?
 
Aadrish said:
… we know that transverse waves are mechanical waves …

that's not true :frown:

where did you get that from?​
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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