1.

A combination of 3 convex lenses is made. The focal length of lens I is +5 cm, lens II is +10 cm and lens III is +20 cm. Calculate the total power of the combination in dioptre? 35

Answer»

A combination of 3 convex lenses is made. The focal length of lens I is +5 cm, lens II is +10 cm and lens III is +20 cm. Calculate the total power of the combination in dioptre?


  1. 35


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