alleryMatch each lens type with its optical power and focal length signs:
A1-A, 2-B, 3-C
B1-B, 2-A, 3-C
C1-C, 2-B, 3-A
D1-A, 2-C, 3-B
Answer & Solution
Correct answer: A. 1-A, 2-B, 3-C
Convex lens has positive power/focus. Concave has negative power/focus. Power P = 1/f in dioptres.
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