Using these 'light detectors' allows us to see and interpret the world around us. Our eyes can only detect a very narrow range of wavelengths of light, which we see as a band of colors . Light and interactions with other objects Before light hits our eyes, it often interacts with all kinds of other objects. This helps us understand, for example, why light bounces off things, or why it is bent went it moves from one substance to another. Prisms of glass changed the direction that light took as it moved from the air, into the glass prism, and then out again back into the air.
Lenses are special glass shapes that have at least one curved surface.
When light passes through a lens, it's path is bent in special ways. The object stays the same, but the image is changed , so we see it differently. Rays of light pass through lenses in special ways, and form a variety of different kinds of images , depending on where they are and what kind of lens is used. But all lenses have their problems , some of which produce very strange results. Now it is your turn.