A convex lens and concave lens each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power (in dioptres) of the combination is :

Vikash Gupta • 24.35K Points
Instructor III Science

Q. A convex lens and concave lens each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power (in dioptres) of the combination is :

(A) 25

(B) Zero

(D) 50

Correct Answer - Option(B)

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