An object of height 4 cm is placed at a distance of 15 cm in front of a concave lens of power, `-10` dioptres. Find the size of the image.

An object of height 2 cm is placed at a distance of 15 cm in front of a concave lens of power -10 dioptre. Find the size of the image.

An object of height 2 cm is held at a distance of 40 cm in front of a concave lens of power - 5D . Find the size of the image?

An object of height 2 cm is placed at a distance of 15 cm from a convex lens of focal length 12 cm. Find the position and size of the image.

An object of size 10 cm is placed at distance of 20 cm in front of aconcave lens of focal length 20 cm. Find the size and nature of image. Also find distance of image from the lens

An object of size 5 cm is placed at distance of 25 cm in front of a convex lens of focal length 20 cm. Find the size and nature of image and its distance from the lens.

An object of 5cm height is placed at a distance of 15cm from a concave mirror of radius of curvature 20 cm. Find the size of the image.

An object of size 5 cm is placed at distance 25 cm in front of a concave mirror of focal length 20 cm. Find the size and nature of image formed ? Also find distance of image from the mirror.

An object of height 2 cm is placed at a distance 20cm in front of a concave mirror of focal length 12 cm. Find the position, size and nature of the image

(a) For which position of an object, a concave mirror forms a real image equal in size to the object ? (b) State one use of a concave mirror. (c) An object of height 1 cm is placed at a distance of 15 cm from a concave mirror of radius of curvature 20 cm. Find the postition, nature and size of the image formed.

An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Find the position and nature of the image.