List out the images that are formed when a convex lens is made up of three different materials.

The shoes are made up of the following material:

The image formed by a convex mirror is always.

A screen is placed 90 cm from an object. The image of the object on the screen is formed by a convex lens at two different locations separated by 20 cm. Determine the focal length of the lens.

List of the four properties of the image formed by a convex mirror

List out the food materials that we can get from plants.