Calculate the frequency and wavelength of a light wave in a medium of refractive index 1.6. Given that the wavelength of light wave in air is `6,400 Å`.

Explanation

To solve the problem, we need to calculate the frequency and wavelength of a light wave in a medium with a refractive index of 1.6, given that the wavelength of the light wave in air is 6400 Å (angstroms).

### Step-by-Step Solution:

1. **Identify Given Values:**
- Wavelength in air (λ) = 6400 Å = \(6400 \times 10^{-10}\) m (since 1 Å = \(10^{-10}\) m)
- Refractive index of the medium (n) = 1.6

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