The ratio of power of two convex lenses is 2:1. When these are placed in contact then power of combination is 6 D. Choose the correct option(s).
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Given,
P
1
=+1.5D
P
2
=+1.0D
The effective power of the combination,
P=P
1
+P
2
P=(+1.5)+(+1.0)
P=+2.5D
The correct option is B.
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