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    hi! please can somebody explain how i should know when a situation is doppler effect, double doppler or "4 x doppler"? i'm worried this is something i will slip up on on thursday! thankyou
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    (Original post by cazi24633)
    hi! please can somebody explain how i should know when a situation is doppler effect, double doppler or "4 x doppler"? i'm worried this is something i will slip up on on thursday! thankyou
    Double Doppler? 4x Doppler?:eek:
    What on earth are you talking about?
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    ooh am i not making any sense? i said i didnt understand it!! ok i'll try this way.. the formula for doppler shift stuff is (Δλ/λ) = (v/c)
    but in some questions you have to use (Δλ/λ) = (2v/c), or (Δλ/λ) = (4v/c). my teacher reffered to it as double doppler. any ideas?
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    Yeah, I don't get what Double Doppler is aswell. I've attached a question on it. The answer to part Bii is Double Doppler and in the following question, you have to do something different to normal Doppler shift calculations.


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    Taken from AQA PHA5 Jan 2004
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    Looks like it occurs on relection of the wave.

    One Doppler shift source - mirror
    One doppler shift mirror back to source.
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    ahhhh great! thankyou very much
 
 
 

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