One face of an equiconvex lens of focal length 60cm made of glass `(mu=1.5)` is silvered. Does it behave like a convex mirror or concave mirror? Determine its focal length.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the Lensmaker's Formula
The lensmaker's formula is given by:
\[ \frac{1}{f_L} = (\mu - 1) \left( \frac{1}{r_1} - \frac{1}{r_2} \right) \]
where:
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