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Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the Figure10.3. Which of the following could be inside the box?
(a) A rectangular glass slab
(b) A convex lens
(c) A concave lens
(d) A prism
Answers (1)
Answer : A
A rectangular glass slab refracts and then re-refracts the rays when incident rays fall perpendicularly at the point of incidence on a rectangular glass slab. Rectangular glass slab causes the lateral displacement of a ray of light following on it. However, incident ray and emergent ray are parallel to each other.
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