Which of the following is true about concave lenses?

Focal length is positive

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Image distance can be positive or negative

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Height of image can be positive or negative

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Image distance is always negative

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Solution

The correct option is D Image distance is always negative
(d) image distance is always negative
As discussed in the sign convention, all distances measured to the left of the optical centre of the lens are taken to be negatrive. Thus, the object distance for a concave lens is always negative.

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Similar questions

Only one of the following applies to a concave lens. This is : (a) focal length is positive (b) image distance can be positive or negative (c) height of image can be positive or negative (d) image distance is always negative

One of the following does not apply to a concave mirror. This is : (a) focal length is negative (b) image distance can be positive or negative (c) image distance is always positive (d) height of image can be positive or negative

Q. Giving reasons, state the 'signs' (positive or negative) which can be given to the following:

(a) object distance (u) for a concave mirror or convex mirror
(b) image distance (v) for a concave mirror
(c) image distance (v) for a convex mirror

Q. Find out the correct option from the following.
(a) The magnification is positive for all virtual images and is negative for all real images.
(b) The magnification of concave lens and convex mirror is always positive where as the magnification of convex lens and concave mirror can be positive or negative depending on the position of the object before the lens.

When do u take image distance positive or negative?

When do u take object distance negative or positive?

Plzz explain it in detail

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Which of the following is true about concave lenses?

The correct option is D Image distance is always negative(d) image distance is always negative As discussed in the sign convention, all distances measured to the left of the optical centre of the lens are taken to be negatrive. Thus, the object distance for a concave lens is always negative.

The correct option is D Image distance is always negative
(d) image distance is always negative
As discussed in the sign convention, all distances measured to the left of the optical centre of the lens are taken to be negatrive. Thus, the object distance for a concave lens is always negative.