The refractive indices of silicate fint glass for wavelength 400 nm and 700 nm are 1.66 aned 1.61 respectively. Find the minimum angles of deviation of an equailateral prism made of this glass for light of wavelength 400 nm and 700 nm.

Explanation

To find the minimum angles of deviation of an equilateral prism made of silicate fint glass for light of wavelengths 400 nm and 700 nm, we can follow these steps:

### Step 1: Understand the Problem
We are given the refractive indices of silicate fint glass for two different wavelengths of light (400 nm and 700 nm). The refractive indices are:
- For 400 nm: \( \mu_1 = 1.66 \)
- For 700 nm: \( \mu_2 = 1.61 \)

We need to find the minimum angle of deviation (\( D \)) for an equilateral prism, which has an apex angle \( A = 60^\circ \).
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