Which one of the following is true for a concave lens?

Image distance is always negative

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Image distance can be positive or negative

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Local length is positive

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Height of image can be positive or negative

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Solution

The correct option is A Image distance is always negative
For concave lens the image is always formed in font of the lens. Now by sign convention of lens the distance in front of the lens is always negative. Hence the answer.

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Can force be negative or is it always positive??

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Which one of the following is true for a concave lens?

The correct option is A Image distance is always negativeFor concave lens the image is always formed in font of the lens. Now by sign convention of lens the distance in front of the lens is always negative. Hence the answer.

The correct option is A Image distance is always negative
For concave lens the image is always formed in font of the lens. Now by sign convention of lens the distance in front of the lens is always negative. Hence the answer.