A piece of glass has two radii. The left side has a radius of 2 cm and the right has a radii of 4 cm. The two are seperated by 8 cm. There is a point object 1 cm left of the glass, find the position of the image.(adsbygoogle = window.adsbygoogle || []).push({});

I need to use the equation

n2-n1/R = n1/do + n2/di, i need to use it twice, once for each radius, and one time it would be negative (the radius).

1.5-1 / .02 = 1/.01 + 1.5/di

Solved it and got di=2 cm

1.5-1/-.04 = 1/.09 + 1.5/di

Solved it got di to be -12 cm.

Combined the two to get -12 + 2 = -10 cm..10 cm behind the piece of glass...does this seem right?

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# Homework Help: Two Radii Lens

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