Two thin lenses in combination are placed in contact with each other along a common axis.They have powers of 50 and -30 diopters,respectively.What is their combined power?
A)10 diopters
B)20 diopters
C)80 diopters
D)-10 diopters

Question

Quizplus · Accepted Answer

The combined power of two lenses in contact is the sum of their individual powers. Therefore, 50 diopters + (-30 diopters) = 20 diopters.

Two Thin Lenses in Combination Are Placed in Contact with Each