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:B
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