A beam of light is incident through the holes on one side of a box and emerges out through the holes on its opposite side as shown in the following figure :The box contains : (a) a glass prism (b) a concave lens (c) a convex lens (d) a parallel-sided glass slab
A beam of parallel light rays is incident through the holes on one side of a box and emerges out through the holes on its opposite side as shown in the diagram below : Which of the following could be inside the box ? (a) a rectangular glass block (b) a concave lens (c) a convex lens (d) a glass prism