What is meant by power of lens you have three lenses lens one lens two lines three of power plus 10d plus 5d and minus 10d?
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THE ABILITY TO CONVERGE OR DIVERGE A RAY LIGHT IS CALLED THE POWER OF THE LENS. NEGATIVE POWER SIGNIFY THAT THE LENS IS CONCAVE LENS AND POSITIVE POWER SIGNIFY THAT IT IS C CONVEX LENS.
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