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Question #89040
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Question
If several lenses are in contact, how is the total power (P) of the combination calculated?
A. P = P1 * P2 * P3 * ...
B. P = P1 + P2 + P3 + ...
C. P = 1/(P1+P2+P3+...)
D. P = (P1+P2+P3)/n
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