A) The emergent ray is deviated from the direction of the incident ray by the angle of deviation
B) The incident and emergent rays are parallel to each other
C) The emergent ray is laterally displaced from glass slab and changes its direction
D) The incident and emergent rays are not parallel to each other
Correct Answer: B
Solution :
Dispersion occurs when light is passed through a prism due to the difference in the angle of deviation for different colours. The opposite sides of a glass slab are parallel and therefore different colors emerge parallel to each other and are seen simultaneously.
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