How Do Lenses Work?

The video tutorial explains the function and importance of lenses, which are optical devices that focus light to form images. It covers the history of the term 'lens', the materials used to make lenses, and a simple experiment to demonstrate magnification. The tutorial delves into how lenses work by focusing light to a focal point, and describes the two main types of lenses: convex and concave. It also introduces compound lenses, which combine both types for adjustable focal points, as seen in DSLR cameras. Finally, the video highlights the role of lenses in everyday life, particularly in the human eye and vision correction tools like glasses and contacts.

Describe how a DSLR camera lens functions.

How do our eyes function as lenses?