Question

1.what happens to the image if convex lens has some black stripes on it ?

Answer 1

Answer:

A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses, such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses.

Explanation:

Answer 2

If the convex lens has some stripes on it, then the intensity of the image only differs.

• When you cover any part of the convex lens with black paper then also the left uncovered portion of the lens will work as a complete lens.
• Every part of the lens forms a complete image, so the uncovered part of the lens also forms the complete image only the intensity of the image will decrease.