Describe the Three Principal Rays Used to Locate an Image
There are three principal rays. Every observer would observe the same image location and every light ray would follow the law of reflection. 18 3 Images Formed By Curved Mirrors Prev Section Next Section Table Of Contents Chapter Contents In The Previous Section We Have Seen That An Object At Infinity Has An Image At The Focal Point After Reflection In A Curved Mirror Light Leaves The Mirror Lets take an example of convex lens. . So we will take an example of any lens. In fact we will usually ignore all the other rays and. It is useful to draw the third ray also to serve as a check on the other two. The 3 rays used to locate a lens image are the primary ray central ray and focal ray. For a concave mirror we see that ray passing through focus becomes parallel to principal axis after reflection For a convex mirror since focus is on the right side it appears that ray passes through focus and then it becomes parallel to princi...