(a) Obtain lens makers formula using the expression
`n_2/v-n_1/u=((n_2-n_1))/R`
Here the ray of light propagating from a rarer medium of refractive index `(n_1)` to a denser medium of refractive index `(n_2)` is incident on the convex side of sperical refracting surface of radius of curvature R.
(b) Draw a ray diagram to show the umage formation by concave mirror when the object is kept between its focus and the pole. Using this diagram, derive the magnification formula for the image formed.

Explanation

### Solution

**(a) Derivation of Lens Maker's Formula**

To derive the lens maker's formula, we start with the given expression:

\[
\frac{n_2}{v} - \frac{n_1}{u} = \frac{n_2 - n_1}{R}
...