Homework Set # 4 - Due September 23

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     1) 1.11.4

     2) 1.11.5

     3) Show that in spherical polar coordinates (r, cos θ, φ) the delta function δ(r₁-r₂) becomes:

[δ(r₁-r₂) δ(cos θ₁- cos θ₂) δ(φ₁-φ₂)]/r₁².

Solution

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          Solution

     5)  4.1.5

     6)  4.1.6