Turn on thread page Beta
    • Thread Starter
    Offline

    3
    ReputationRep:
    What is the medium for sounds waves and light waves and how do they travel through their medium?
    Offline

    0
    ReputationRep:
    Sound waves travel through matter and light simply travels through space i.e. it doesn't require a medium like sound does. What do you mean by "how do they travel through their medium"?
    • Thread Starter
    Offline

    3
    ReputationRep:
    I mean How does sound waves travel through their medium.

    Here is the original question: State the mediums for a sound wave and light wave in air and explain how sound waves travel through their medium.
    Offline

    2
    ReputationRep:
    For sound waves: molecules oscillate in simple harmonic motion and collide with adjacent molecules.

    To reiterate TheNack's point, yes, light waves do not need a medium to propagate through, unlike sound which needs a lot of particles so they can vibrate and transfer the energy.
    • Thread Starter
    Offline

    3
    ReputationRep:
    Ok Thanks ALOT!! Last Question I need to ask is:
    a) A man claps his hands on a hilltop.
    He hears the echo 0.7 S later.
    (i) If the speed of sound is 340 m/s, how far away was the surface from which the sound rebounded?

    This is what I did: Speed= Distance (Divide) Time.
    340= Distance (Divide) Time.
    and just rearange.

    Can you show me how you do it and give me your answear thanks.
    Offline

    10
    Regarding "how" sound waves travel through air, it may be worth mentioning that the waves are longitudinal, that is to say, pressure waves. The same is true for sound in water and solids, but in solids the waves can also be transverse. Light is also a transverse wave.

    In the calculation, the distance you calculate will be twice the answer because the sound has to travel there and back.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 26, 2010
The home of Results and Clearing

2,518

people online now

1,567,000

students helped last year

University open days

  1. SAE Institute
    Animation, Audio, Film, Games, Music, Business, Web Further education
    Thu, 16 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Fri, 17 Aug '18
  3. University of Bolton
    Undergraduate Open Day Undergraduate
    Fri, 17 Aug '18
Poll
Do you want your parents to be with you when you collect your A-level results?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.