Please explain...........

Asked by ketagajjar | 1st Feb, 2009, 10:09: PM

Expert Answer:

Diffusion is observable at distances Z>d2 (Z is called Fresnel distance)

 

         Here Z = 40 km = 40,000 m

                   d = 50 m

        

       But the hill is half way between the tower so distance upto which much of diffraction will not be observable should be 40/2 = 20km = 20,000m

                   20000=(50)2 /λ

λ = 0.125m

Answered by  | 5th Feb, 2009, 04:29: PM

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