Question

The focal length of a convex lens is 50cm.express its power and sign.​

Answer 1

Explanation:

Hello bro, here is your step by step explanation.

Focal Length(f) = 50cm (Positive sign because it is convex lens.)

We know the formula:-

Power = 1/Focal Length(in meter)

Power = 100/50 (Converting 50 cm into meter by dividing it with 100)

Power = +2D

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Answer 2

Answer:

Explanation:

Focal length=50cm therefore power of lens will be 100/50= +2 dioptre will be the annswer because focal lenth is in meter