Question

A camera is an optical instrument in which __________ is used.

• A. convex
• B. concave
• C. cylindrical
• D. none of these

Answer 1

The correct option is A

convex

Explanation

1. A camera is a piece of equipment that records images. It has a small hole called an aperture that lets light rays in and aids in image capture.
2. Lenses are built into cameras to adjust the strength of light entering the hole.
3. The camera's main goal is to concentrate all of the light rays into a single point so that a clear and vivid image of the object can be generated.
4. A convex lens is also known as a converging lens, which is why it is employed in cameras.
5. The light beams strike the camera's lens and focus on one place.
6. A sharp image is formed as a result of this.

Hence, the correct answer is option (A) the convex lens.