JEE Main 2023 Physics question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: The phase difference of two light waves change if they travel through different media having same thickness, but different indices of refraction. Reason R: The wavelengths of waves are different in different media. In the light of the above statements, choose the most appropriate answer from the options given below

• (A)Both A and R are correct but R is NOT the correct explanation of A
• (B)A is not correct but R is correct
• (C)A is correct but R is not correct
• (D)Both A and R are correct and R is the correct explanation of ACorrect