A biconcave lens made of transparent material of refractive index `1.25` is immersed in water of refractive index `1.33`. Will the lens behave as a convering or diverging lens? Given reason.

Explanation

To determine whether a biconcave lens made of a transparent material with a refractive index of 1.25 behaves as a converging or diverging lens when immersed in water with a refractive index of 1.33, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Refractive Indices**:
- Refractive index of the lens material (μ_l) = 1.25
- Refractive index of the surrounding medium (water, μ_w) = 1.33

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