Light of wavelength `4500^(@)` in air is incident on a plane boundary between air and another medium at an angle `30^(@)` with the plane boundary. As it enters from air into the other medium, it deviates by `15^(@)` s towards the normal Find refractive index of the medium and also the wavelength of given light in the medium.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Identify the known values
- Wavelength of light in air, \( \lambda_1 = 4500 \) Å (angstroms)
- Angle of incidence, \( i = 30^\circ \)
- Deviation towards the normal, \( d = 15^\circ \)

### Step 2: Determine the angle of refraction
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