Differentiate between refraction through a rectangular glass slab and refraction through a prism.

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Solution

Rectangular glass slab Prism

1. The incident ray and emergent ray are parallel to one another. 1. The incident ray and emergent ray are not parallel to one another.

2. The angle of incidence is equal to the angle of emergence. 2. The angle of incidence may or may not be equal to the angle of emergence.

3. White light does not split as it emerges outward. 3. White light splits into seven colours as it emerges outward.

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Rectangular glass slab	Prism
1. The incident ray and emergent ray are parallel to one another.	1. The incident ray and emergent ray are not parallel to one another.
2. The angle of incidence is equal to the angle of emergence.	2. The angle of incidence may or may not be equal to the angle of emergence.
3. White light does not split as it emerges outward.	3. White light splits into seven colours as it emerges outward.