- #1

mithil03

- 9

- 0

## Homework Statement

Suppose we have a microscope made out of two lenses, both with a focal length of

25mm, placed 36.5mm apart. Find how far in front of the first lens should the object be

placed to assure that the image is magnified at least by a factor of 75?

One more:

Suppose that we have a positive lens with radii 60 and 100 and thickness of 3 (any units,

as long as you are consistent), with an index of 1.5. If an object with a height of 10 is

placed at a distance of 100 from the lens, find at what distance from the back surface is

the image formed. DO NOT treat this as a thin lens.

## Homework Equations

## The Attempt at a Solution

The first one, couldn't understand how to calculate for magnification factor of 75

Help please...