A source of yellow light placed in air is observed by a person swimming under water. If the wavelength of yellow light in air is 6000Å , then determine its velocity, wavelength and colour as observed by the person. Take ve locity of light in air `(c=3 xx 10^8 m//s^(-1))`

Explanation

To solve the problem step by step, we will determine the velocity, wavelength, and color of yellow light as observed by a person swimming underwater.

### Step 1: Determine the velocity of light in water

The velocity of light in a medium can be calculated using the formula:
\[ v = \frac{c}{\mu} \]
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