 
			 
			MCQOPTIONS
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				| 1. | X is thicker in the middle than at the edges, whereas, Y is thicker at the edges than in the middle. Identify X and Y . | 
| A. | X = concave lens; Y = convex lens | 
| B. | X = convex lens; Y = concave lens | 
| C. | X = plane lens; Y = convex lens | 
| D. | X = concave lens; Y = plane lens | 
| Answer» C. X = plane lens; Y = convex lens | |