This is for my take home, any and all help would be greatly appreciated!! http:/

Question

                        This is for my take home, any and all help would be greatly appreciated!!                     

                        http://s978.photobucket.com/user/mti193/media/IMG_17371_zps3ad064f7.jpg.html                     

                                             Note: The angle you have to find is such that the final intensity equals your chosen fraction of the initial intensity?

Explanation / Answer

Fraction=1/6 suppose

I1/I0=(cos theta)^2

I2/I1=(cos theta)^2 and so on

So I6/I1= (cos theta)^12 = 1/6

cos theta=0.861

theta=30.53 degree

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