The total power of this lens combination is 5.66D.
It is given that two converging lenses one with a focal length of 60.0 cm and one with a focal 25.0 cm are placed in contact.
We need to determine the total power of the combination of lenses.
Power of first lens = 1/focal length of first lens.60 cm = 0.6 mPower = 1.66DAs it is converging, P is positive.
Power of second lens = 1/focal length of second lens25.0 cm = 0.25 mAs it is converging, P is positive.
Power = 1/0.25 = 4D.So the combination is 1.66+4=5.66D
The total power of this lens combination is 5.66D.
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