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Thread: Please help me - ex. in astrophysics with delta function :-(

  1. #1 Please help me - ex. in astrophysics with delta function :-( 
    Junior Member
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    Oct 2013
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    Hi,

    I'm trying to solve this ex.(see attached - jpg file) with the delta function, but it seems i don't remember how to use the delta (Dirac) function in the integral...
    could someone help me pls?ex1.jpg

    thanks in advance!
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  2. #2  
    Administrator Markus Hanke's Avatar
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    What have you done thus far to try and solve this integral ? Can you show your ansatz and/or some of your steps ?
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  3. #3  
    Junior Member
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    Oct 2013
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    Hi,

    I've started with the assumption of spherical symmetry - in the attached file... I guess it's not that complicated to solve it, but I don't know how to use this form of delta function.

    Thanks again
    my_ans.jpg
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