Difference between a glass slab a prism ? How refraction is different in these cases ?
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When a narrow beam of white light passes through:
Glass slab: The splitting of white light into its constituent color does not occur. And the direction of the incident ray and the emergent ray of light are parallel to each other. Glass prism: The splitting of white light into its constituent seven colors occurs.
Refraction through a rectangular glass slab and principle of reversibility of light: On entering the glass slab, it bends towards normal and travels along EF at an angle of refraction r. ... The refracted ray EF is incident on face SR at an angle of incidence r'.
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