JEE Advanced 2021 Full Test 1 Paper 2

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SECTION – C (Numerical Answer Type)
This section contains 06 questions. The answer to each question is a NUMERICAL VALUE. For each question, enter the correct numerical value (in decimal notation, truncated/rounded-off to the SECOND DECIMAL PLACE; e.g. XXXXX. XX).

Question : 16 of 54

Marks: +1, -0

In young's double slit experiment, the coherent sources are separated by a small distance and screen is placed at a large distance. Thin strips are placed infront of slits S1 and S2 as shown. The strip which is placed in front of S1 has width 4mmand has refractive index 1.5. The strip which is placed infront of S2 has a variable refractive indexµ=1+Cx where x is distance from left end of strip and C=1mm−1.
If central maxima is obtained at O {symmetrical with respect to O}, then find width of strip (in mm ) placed in front of S2.

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