1(xv)
A block of glass is pushed into the path of the light as shown below. Then the converging point X will :

- (a)Move away from the slab
- (b)Move towards the slab
- (c)Not shift
- (d)Move towards the left side of the lens
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Move away from the slab
Reason — When a converging beam of light enters a glass slab, the rays will bend towards the normal within the glass, and then bend away from the normal as they exit the glass back into air. This bending will cause the point of convergence (focus) to shift away from the glass slab.