What are lenses and their types?

What are lenses and what types are there?

Lenses are optical devices that focus or disperse light. They come in various types, including convex, concave, and cylindrical.

Can you explain the difference between convex and concave lenses?

Sure! Convex lenses converge light rays to a focal point, while concave lenses diverge light rays.

What are some practical applications of these lenses?

Convex lenses are used in magnifying glasses and cameras, while concave lenses are found in glasses for nearsightedness.

Are there any other types of lenses I should know about?

Yes! There are also cylindrical lenses, which are used to correct astigmatism, and multifocal lenses for presbyopia.