A parallel beam of light is incident on a glass item behind curtain ABCD. The emergent rays coming out from the item are as given in the following figure. Which item could be behind the curtain?

A parallel beam of light is incident on a glass item behind curtain AB

1.	A parallel beam of light is incident on a glass item behind curtain ABCD. The emergent rays coming out from the item are as given in the following figure. Which item could be behind the curtain?
A.	Concave lens
B.	Convex lens
C.	Rectangular glass slab
D.	Prism
Answer» C. Rectangular glass slab

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A parallel beam of light is incident on a glass item behind curtain ABCD. The emergent rays coming out from the item are as given in the following figure. Which item could be behind the curtain?

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