Results 1 to 3 of 3

Thread: Does light amplify sound waves?

  1. #1 Does light amplify sound waves? 
    New Member
    Join Date
    Apr 2013
    For an example, a sound source such as a radio or television emitting sound at loud volume with a light source such as a bright lamp able to brighten a large room substantially/noticeably, or sunlight preferably the same amount of space brightened as the lamp. Lets say the sound source is in the center of the room. If the light does affect the sound (enhanced, not decreased), is the sound difference enough for the average human ear to notice. Compared from light to somewhat darkness. Sorry for the vague variables.

    Reply With Quote  


  3. #2  
    Genius Duck Dywyddyr's Avatar
    Join Date
    Jan 2013
    Scunthorpe, UK
    Light is electromagnetic.
    Sound is compression/ rarefaction of the atmosphere.

    Unless the light is "bright" enough (sufficient energy) 1 to significantly heat the surrounding air there won't be any noticeable effect at all.

    1 And that would probably mean it's not in the visible wavelengths.

    Edit: Hmm, there could be a psychological effect that alters the perception of the sound. But I'm guessing here.

    "[Dywyddyr] makes a grumpy bastard like me seem like a happy go lucky scamp" - PhDemon
    Reply With Quote  

  4. #3  
    Forum Freshman WaterWalker's Avatar
    Join Date
    Jan 2013
    KZN, South Africa
    As Dywyddyr has said, sound and light are not the same. Sound needs a medium to propagate, while light doesn't. So, no interference pattern can exist. Dywyddyr, that's an interesting thought. Does a warmer room have an impact on sound? Amplitude, frequency, distance it can travel, ect? If so, it would be a fascinating classroom experiment.
    "No army is stronger than an idea whose time has come." - Victor Hugo

    Dywyddyr - "You're rather good at denying reality, aren't you?"
    Plautus - "False."
    Dywyddyr - "And you've done it again. Well done. Would you like a biscuit?"
    Reply With Quote  

Similar Threads

  1. Replies: 1
    Last Post: May 22nd, 2011, 11:37 AM
  2. Sound waves
    By Aero in forum Physics
    Replies: 4
    Last Post: March 8th, 2009, 02:34 PM
  3. Ultrasonic Sound Waves
    By MoltenWhale in forum Electrical and Electronics
    Replies: 6
    Last Post: October 7th, 2008, 01:29 AM
  4. Sound Waves
    By MoltenWhale in forum Electrical and Electronics
    Replies: 5
    Last Post: May 28th, 2008, 06:20 AM
  5. visible sound waves
    By AlexP in forum Physics
    Replies: 7
    Last Post: April 7th, 2007, 12:25 PM
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts