A convergent lens is combined with a divergent lens and the power of combination of lenses is -2D. Find the focal length of this combination.
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According to question
Power = 1/ focal length in meter
-2 = 1/ focal length
focal length= 1/-2
-0.5m
Power = 1/ focal length in meter
-2 = 1/ focal length
focal length= 1/-2
-0.5m
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