An object of height `1cm` is set at angles to the optical axis of a double convex lens of optical power `5D` and `25cm` away from the lens. Determine the focal length of the lens, the position of the image. The linear magnification of the lens, and the height of the image formed by it.

An object of height 5 cm is placed perpendicular to the principal axis of a concave lens of focal length 10 cm. If the distance of the object from the optical centre of the lens is 20 cm. Position, nature and size of the image formed.

A convex lens of focal length 20cm is placed 10cm away from a second convex lens of focal length 25 cm. What wil be the location of the image of an object at 30 cm in front of the first lens?

A convex lens of focal length 20cm is placed 10cm away from a second convex lens of focal length 25 cm. What wil be the location of the image of an object at 30 cm in front of the first lens?

An object is kept at 20 cm in front of a convex lens its real image is formed at 60 cm from the lens. Find (i) the focal length of the lens (ii) the height of the image if the height of the object is 6 cm.

An object is kept at 60 cm in front of a convex lens. Its real image is formed at 20 cm from the lens . Find the focal length and power of the lens.

An object of height 1.5 cm is placed on the axis of a convex lens of focal length 25 cm . A real image is formed at a distance of 75 cm from the lens. The size of the image will be

An object 2 cm tall is placed on the axis of a convex lens of focal length 5 cm at a distance of 10 m from the optical center of the lens. Find the nature, position and size of the image formed. Which case of image formation three times. Find the distance of the lens from the filament and the focal length of the lens.