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Homework Help: Physical Science

Posted by mysterychicken on Tuesday, May 5, 2009 at 10:05am.

I've answered these two questions and need someone to check them for me:

1.Describe two characterisitics that light and sound have in common.
Ans- They both transfer energy [and I need help thinking of a second one]

2.Describe two ways in which light and sound are different
Ans- Light is an electromagnetic wave and it travels faster through empty space; sound is a mechanical wave and it travels faster through dense matter.

Thanks!
-MC

• Physical Science - SraJMcGin, Tuesday, May 5, 2009 at 10:11am

  Thank you for using the Jiskha Homework Help Forum. You might like some of the following sites:
  
  http://www.google.com/search?q=light+%26+sound&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
  
  Sra
  

• Physical Science - mysterychicken, Tuesday, May 5, 2009 at 10:22am

  Thanks
  -MC
  

• Physical Science - drwls, Tuesday, May 5, 2009 at 11:14am

  1. An important similarity is that both have wavelike properties: a 'travelling' oscillation, with frequency, wavelength and a fixed wave speed.
  
  2. An important difference is that light is a transverse wave and sound is a longitudinal wave (with motion back and forth along the direction of wave propagation). See http://www.kettering.edu/~drussell/Demos/waves/wavemotion.html
  to see a video of the difference. With light, the transverse variation involves electric and magnetic fields, not particle motion.
  

• Physical Science - mysterychicken, Tuesday, May 5, 2009 at 11:49am

  Thanks!
  -MC
  

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