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

Parallel light rays enter a transparent sphere along a line passing through the center of the sphere. The rays come to a focus on the far surface of the sphere. What is the sphere's index of refraction?

2. Relevant equations

3. The attempt at a solution

so I used the equation that relates object distances and image distances for spherical surfaces: n1/s + n2/s' = (n2-n1)/R

I am calling the radius of the sphere R

(1.00)/s + n2/2R = (n2-1.00)/R and I think for this case s[tex]\rightarrow[/tex][tex]\infty[/tex]

so n2/2R = (n2-1)/R

n2 = 2(n2-1)

n2 = 2n2 -2

-n2=-2

so n2= 2.00 Is this correct?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Refraction by a transparent spherical surface

**Physics Forums | Science Articles, Homework Help, Discussion**