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Thread: waves from waves

  1. #1 waves from waves 
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    to measure the stars astronomers measure the wavelength of light coming from the star in question - if the light changes (due to a change in wavelength) they can calculate how the star is oscillating or 'sits' in the universe (how it moves etc.).

    So waves change (even if the example was light) if I move an object. Say I had a speaker and I moved it towards the direction of where the sound is going - if I move it quick enough I can change the wavelength...............?

    First question - is the above (second) paragraph correct?

    Second question - if I follow a soundwave it will be creating lots of other waves as it hits each atom in many many directions - is this true and if so are there equations to help explain/predict it?

    Much obliged!


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  3. #2 Re: waves from waves 
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    Quote Originally Posted by fatman57
    So waves change (even if the example was light) if I move an object. Say I had a speaker and I moved it towards the direction of where the sound is going - if I move it quick enough I can change the wavelength...............?
    Yes. http://en.wikipedia.org/wiki/Doppler_effect


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  4. #3  
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    of course...........
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