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JEE Main 2025 (23 Jan, Shift 1) · Refraction, Glass Slab & Apparent Depth

Refraction, Glass Slab & Apparent Depth question from JEE Main 2025 (23 Jan, Shift 1)

Q10JEE Main 2025 · 23 JAN · SHIFT 1Easy

Refraction, Glass Slab & Apparent Depth

What is the lateral shift of a ray refracted through a parallel-sided glass slab of thickness ' hh ' in terms of the angle of incidence ' ii ' and angle of refraction ' rr ', if the glass slab is placed in air medium?

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Answer: (d)

  1. Path inside the slab: OB=hcos⁡rOB = \frac{h}{\cos r}.
  2. Lateral shift = perpendicular distance between incident and emergent rays =OBsin⁡(i−r)= OB \sin(i - r)
  3. d=hsin⁡(i−r)cos⁡rd = \frac{h \sin(i-r)}{\cos r}. So the answer is (d).
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