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**optics,how many images will the object form???**

## Homework Statement

**the lens shown in figure 19.16**(http://img705.imageshack.us/img705/5066/figure1916.png [Broken]

**made of two different materials . a point object is placed on the axis....how**

**many images will the object form???**

## Homework Equations

**1/f = (n-1) [1/R1 - 1/R2], where f is the focal length, n is the refractive index, R1,R2 - radii of the curvature of refracting surfaces.**

## The Attempt at a Solution

**i didnt reach the answer but i think it has something with refractive index , and focal lenth.....plz help..**

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