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 figure. 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
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A rectangular glass slab could be inside the box.
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 figure.
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
Explanation :
- Here beams of light are incident parallel through the holes A and B and emerge out of the box parallel through the holes C and D respectively as you can see in figure.
- This phenomenon is known as lateral displacement.
- when an incident beam of light refracted through a glass slab, it emerges in a direction parallel to the original but slightly displaces with the line. Now the perpendicular distance between incident ray and emergent ray is known as lateral displacement. [ see attached diagram ]
- This happens when beams of light pass through a rectangular glass slab.
Therefore the rectangular glass slab could be inside the box.
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