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Focal length of a convex lens is +40 cm. The power of this lens will be

(a)

+ 4 dioptre

(b)

+2.5 dioptre

(c)

+40 dioptre

(d)

+25 dioptre



Question ID - 100053 | SaraNextGen Top Answer

Focal length of a convex lens is +40 cm. The power of this lens will be

(a)

+ 4 dioptre

(b)

+2.5 dioptre

(c)

+40 dioptre

(d)

+25 dioptre

1 Answer
127 votes
Answer Key / Explanation : (b) -

+2.5 dioptre

127 votes


127