A beam of light composed of red and green ray | vedclass

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(B) When a beam of light consisting of different colors (wavelengths) enters a rectangular glass slab, it undergoes refraction.According to Snell's La

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Two points propagating in two parallel directions

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(B) When a beam of light consisting of different colors (wavelengths) enters a rectangular glass slab, it undergoes refraction.According to Snell's Law, $n_1 \sin i = n_2 \sin r$. Since the refractive index of glass is different for different wavelengths (Cauchy's equation), the angle of refraction $r$ will be different for red and green light.Because the angles of refraction are different, the rays travel along different paths inside the glass slab.When they reach the opposite parallel face, they emerge from two distinct points.However, since the two faces of the slab are parallel, the emergent rays will be parallel to the incident ray and, consequently, parallel to each other.

$A$ beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from

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