Lenses mirrors physics pdf file

Choose your answers to the questions and click next to see the next set of questions. You need only two rays to determine where an image is. All lenses are broken into two broad groups, depending on whether they focus light at a point converging lens, or spread it out diverging lens. Exploring images with thin lenses and mirrors 1 of 20 introduction. Use the lensmakers equation to determine the focal length of a thin lens. A beam of light parallel to the principal axis of a convex mirror appears to diverge from a virtual focus. With a converging lens, paraxial rays that are parallel to the principal axis converge to the focal point, f.

The shape of a lens is named in a similar way to the naming of mirrors, its just a little more complicated. University physics 227n232n mirrors and lenses todd satogata. Ray 3 passes straight through the center of the lens. You may be familiar with simple lenses and how they form images.

The refraction at the first surface is balanced by the refraction at the second surface. Pdf optical images due to lenses and mirrors researchgate. The f ray passes through the focal point on the near side of the lens, then leaves the lens parallel to the principal axis. In principle, electromagnetic waves may have any wavelength, from zero to arbitrarily long. The lens of your eye or a camera collects and focuses light and forms an image on retina or a piece of film or digital detector. It is proven in introductory physics textbooks1 that the image and. Just as for mirrors we use three rays to find the image from a lens. The focal length, f, is the distance between f and the lens. Rays of light parallel to the principal axis after refraction through a convex lens meet at a point converge on the principal axis. The distance to the image and the distance to the object are measured. A graph of the inverse of the image distance as a function of the inverse of the object distance is plotted. Note that, applying the sign conventions, the final image is virtual, and inverted compared to the object.

The primary goals are to understand the relationship between image distance, object distance, and image scale. This video contains the properties of concave mirror, concave lens, convex mirror and convex lens and also the types of questions, which could be asked fro. You can skip questions if you would like and come back. The m ray passes through the middle of the lens with no deflection. Two prisms can bend light toward the principal axis acting like a crude converging lens but cannot create a sharp focus. The overall magnification of the two lens system is. Concaveconvex mirror and lenses for ssc cgl, chsl, mts. Converging lenses are always convex in shape, which means the centre is thicker than the edges. When a light ray travels from one medium to another, part of the incident. A ray passing through the center of any lens continues in a straight line. This is equal to the final height divided by the height of the object, as it should be.