Question

diffrenciate between sound wave and light wave​

Answer 1

Answer:

Sound Waves

1. Require a medium.
2. Travel with a speed of 332 m/s at 0 C.  
3. Are longitudinal waves consisting of compressions and rarefactions.
4. Are of different frequencies, giving notes of different pitches.
5. Do not travel far as their energy is dissipated easily.

Light Waves

1. Do not require a medium
2. Travel with a speed of 3 *108 m/s.
3. Are electromagnetic waves consisting of varying electric and magnetic fields.
4. Are of different frequencies, resulting in different colors.
5. Can travel through a much greater distance.

The differences between light and sound are as follows:

• Light can be considered to be made of waves as well as particles. Sound is only a wave. It does not show particle nature.
• Light waves are electromagnetic waves while sound waves are mechanical waves.
• Light waves are transverse while sound waves are longitudinal.
• Light waves can travel in vacuum. Sound waves require a material medium to travel, and hence, cannot travel in vacuum.
• The speed of light in a medium is constant. The velocity of sound waves can change.
• In sound waves, the particles of the medium actually oscillate. In a light wave, the electric and magnetic vectors oscillate.
• Light waves can be polarized, but sound waves cannot.
• Light waves travel much faster than sound waves. The speed of light is a physical constant. Its value is exactly 299,792,458 meters per second in vacuum. The speed of sound is 343 meters per second in dry air at 20°C.
• And finally, a simple one - you can see light while you can hear sound.

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