A combination of lenses is prepared by keeping a, think convex lens of 40 cm focal length and a thin concave lens of 40 cm focal length and a think concave lens of 15 cm focal length in contact.
So, the power of combination = ................D.

1.5

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- 1.5

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6.67

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- 6.67

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Solution

The correct option is C 6.67
Option C is correct

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Similar questions

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is

40 cm

25 cm

40

25

40 c m

25 c m .

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