CTET 2 Math and Science Jul 2013 Paper

A concave mirror is widely used in a vehicle's lighting system to focus the light from a vehicles headlight. This is often done to help achieve good lighting system. The concave mirror is also significant in ensuring that the light energy is concentrated in one place and for that matter, it is used to focus light for heating purposes. The convex lenses can be used in magnifying glasses. They are thicker in the center than in the edges. They are also used in the glasses of those affected with farsightedness. The shape of the lenses used for our eyes is also convex so as to allow it to fit snugly into the eye in shape.