Mirrors and Lenses. Chapter 14. Mirrors. Mirrors have a highly reflective surface. Mirrors work by Light striking the mirror and being reflected back. The reflected waves hit an object facing the mirror, illuminating the object. The waves of light enter your eyes.
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A lens is a transparent material with at least one curved surface that causes light rays to bend (refract) as they pass through.
Like mirrors, lenses can be concave or convex.
Lenses are often used to correct vision. Since the image is formed behind the retina, concave and convex lenses correct the way the light comes into the eye.
A wide angle lens produces a small image that includes much of the surroundings.
A telescope uses lenses and concave mirrors to increase the light coming in from distant places, so that your eye can receive that light and your brain interpret the information.
Refracting Telescope - A simple telescope, it uses 2 convex lenses to magnify the light.
Reflecting Telescope – A more complex telescope that can enhance light from distant places. It uses a concave mirror, a plane (flat) mirror and a convex lens to converge light at a focal point.