Camden constructs a model of a double convex lens using two clear plastic circles that are round on one side and flat on the other. He attaches the circles at the edges. How does his model look? A
It is thicker on the left side and thinner on the right side.
B
It is thicker in the middle and thinner at the edges.
C
It is completely flat from the middle to the edges.
D
It is thinner in the middle and thicker on the edges.