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Hint: Apply Snell's Law and Refractive index formula to get the answer

Snell's Law describes the relationship between the angles of the two light waves and the indices of refraction of the two materials as:

n1 x sin(q1) = n2 x sin(q2)

Refractive Index (n) = D(measured)/D(apparent)

where D(measured) is the measured depth (from the surface of the liquid to the position of the mark on the empty cell) using the microscope, and D(apparent) is the mark measurement with and without liquid.

commented by (8k points)
I did just like that but the answer didn't match
commented by (14.7k points)
@Rahul, I have updated the answer.
commented by (35 points)
Please can u explain it again step by step
commented by (10 points)
Explain it in step by step

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