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## Homework Statement

The problem is page 5 on: http://www.physics.ox.ac.uk/olympiad/Downloads/PastPapers/Paper3_2010_.pdf [Broken]

I will just summarise the question:

The refractive index of space,n, at a distance r from the sun is given by √(1+5920/r). The light from a distant star is deflected by a small angle θ. Using a simple model, calculate θ.

## Homework Equations

Snell's law?

## The Attempt at a Solution

I have no idea of how to get started with this question. I think that the model will involve some discrete layers but I still wouldn't know how to do the problem. Any help would really be appreciated.

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