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## Homework Statement

A small light bulb is placed 10.0 cm from the center of a plastic sphere of radius 1.0 cm

and refractive index 1.40. Where is the image of the bulb?

## Homework Equations

1) Thin lens equation

2) Thick lens equation

## The Attempt at a Solution

I realize that I'm going to have to treat this object as a lens, but I'm not totally sure about whether to use the thin lens formula or not. Would I treat this object as a "thick" lens and use its diameter as its thickness? Or is the spherical nature of the object going to require another equation? Thanks in advance.