(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

(x^2 + y^2)/a^2 + z^2/c^2 = 1

2. Relevant equations

3. The attempt at a solution

the answer is :

b(θ) = R / (f^2 * tan^2(θ/2) + 1)^0.5

I can't understand how to calculate this.

My attempt :

(x^2 + y^2)/a^2 + z^2/c^2 = 1 from this.

b^2 + z^2/f^2 = a^2 , f = c/a, z = b*cot(∅)

b^2 *[ 1 + {1/f*tan(∅)}^2 ] = a^2

could you give a hand?...

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# Homework Help: Classical ellipsoidal scattering Impact parameter

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