what are the differences between refraction in a glass slab and a prism?

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Solution

in refraction through glass slab incident ray and emergent ray are parallel to each other.
in refraction through glass prism incident ray and emergent ray are not parallel to each other.

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Q. Please elaborate difference between refraction through prism and refraction through glass slab.

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Dispersion of white light occurs because different colours of white light undergo different extents of refraction. The dispersion is not evident in a glass slab like it is evident in a prism because the two refracting surfaces are parallel to each other.

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what are the differences between refraction in a glass slab and a prism?

in refraction through glass slab incident ray and emergent ray are parallel to each other.in refraction through glass prism incident ray and emergent ray are not parallel to each other.

in refraction through glass slab incident ray and emergent ray are parallel to each other.
in refraction through glass prism incident ray and emergent ray are not parallel to each other.