Double Integral Surface Area of Spherical Ball

  • #1
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Homework Statement



Double Integral Surface Area of Spherical Ball radius

Homework Equations



##\int_S d\vec{S} = 4*\pi*a^2##

The Attempt at a Solution



##\int\int_0^a f(r,?) dr d? = 4*\pi*a^2##
 
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Answers and Replies

  • #2
LCKurtz
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Homework Statement



Double Integral Surface Area of Spherical Ball radius

Homework Equations



##\int_S d\vec{S} = 4*\pi*a^2##

The Attempt at a Solution



##\int\int_0^a f(r,?) dr d? = 4*\pi*a^2##

What is the dS element in spherical coordinates?
 
  • #3
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##dS = r^2*sin\phi*d\theta*d\phi##

I can take it from here!
 
  • #4
LCKurtz
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Good. Remember the only two variables are ##\theta## and ##\phi##. The radius is constant.
 

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