Lateral Displacement through a Parallel Slab – Rankers Physics
Topic: Ray Optics
Subtopic: Reflection by Plane Mirror

Lateral Displacement through a Parallel Slab

Assertion (A): A parallel beam of light travelling in air can be displaced laterally by a parallel transparent slab by distance more than the thickness of the plate.
Reason (R): The lateral displacement of light travelling in air increases with fall in value of refractive index of slab.
 
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution:

Assertion A is false as the lateral displacement of light through a parallel slab is always less than or equal to its thickness. Reason R is false because lateral displacement decreases as the refractive index of the slab falls.

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