If velocity of bird (B) in downward direction with respect to surface (water and air) is 3m/s. Then what is the velocity of bird (B) with respect to fish (F) ? `(._(a)mu_(w) = (4)/(3))`

Explanation

To find the velocity of the bird (B) with respect to the fish (F), we can follow these steps:

### Step 1: Understand the given information
We know that the velocity of the bird (B) in the downward direction with respect to the surface (water and air) is given as 3 m/s. We also have the refractive index (μ) of water with respect to air, which is given as \( \frac{4}{3} \).

### Step 2: Establish the relationship between the bird's height and the fish's height
The apparent height of the bird (B) as seen from the fish (F) is affected by the refractive index. The apparent height (h') of the bird with respect to the fish can be expressed as:
\[ h' = \mu \cdot h \]
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