An object of height 3 cm is placed in front of a convex lens of focal length 20 cm at a distance of 30 cm.
What is the height of the image ?

An object of height 3 cm is placed in front of a convex lens of focal length 20 cm at a distance of 30 cm. What is the nature of the image?

An object of height 3 cm is placed in front of a convex lens of focal length 20 cm at a distance of 30 cm. What is the distance to the image formed ?

When an object of height 3 cm is placed at a distance of 30 cm from a lens, a real image is formed at a distance of 60 cm. Find out the height of the image.

When an object is placed at a distance of 15 cm from a convex lens, a real image is formed at a distance of 30 cm. What is the focal length of the lens?

An object of 5 cm is kept infront of a convex mirror having radius of curvature 30 cm at a distance of 10 cm. Calculate the position , size and feature of object.

When an object of height 4 cm is placed in front of a concave mirror an image of height 8 cm is for - med. Find the magnification.

A 1 cm tall object placéd at a distance 2 f from a convex lens. What is the height of the image forms.