A ray of light of wavelength 6600 Å suffers refraction from air to glass. Taking _aμ_g = 3/2, find the wavelength of light in glass.

In refraction of light through a prism, the light ray:

1. suffers refraction only at one face of the prism
2. emerges out from the prism in a direction parallel to the incident ray
3. bends at both the surfaces of the prism towards its base
4. bends at both the surfaces of prism opposite to its base.

The angle of prism A is given as:

1. r₁ - r₂
2. i₁ + i₂
3. r₁ + r₂
4. r₁ / r₂

The angle of deviation becomes minimum when:

1. i₁ = r₁
2. i₁ = r₂
3. i₁ = i₂
4. r₂ = i₂