Assertion: Two prisms of different materials can be used to attain a condition of angular dispersion without mean deviation. Reason: When two prisms of appropriate materials and refracting angles are oppositely directed then mean deviation produced by one can be cancelled by the other due to opposite sense.

Assertion: Two prisms of different materials can be used to attain a c

1.	Assertion: Two prisms of different materials can be used to attain a condition of angular dispersion without mean deviation. Reason: When two prisms of appropriate materials and refracting angles are oppositely directed then mean deviation produced by one can be cancelled by the other due to opposite sense.
Answer» If both ASSERTION and REASON are CORRECT and rason is a correct explanation of the assertion. If both assertion and reason are correct but reason is not the correct explanation of assertion. If assertion is correct but reason is INCORRECT. If assertion is incorrect but reason is correct. Answer :A

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