Question : Which of the following statements regarding the lenses is/are correct?
I. The power of a convex lens is represented as a positive number.
II. Power of a concave lens is represented as a negative number.
Option 1: Both I and II
Option 2: Only II
Option 3: Only I
Option 4: Neither I nor II
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Correct Answer: Both I and II
Solution : The correct option is both I and II .
In optics, the power of a convex lens is represented as a positive number, indicating its converging ability. Conversely, the power of a concave lens is a negative number, denoting its diverging nature. This convention helps in expressing the optical characteristics of lenses concisely.
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