Question

in the diagram below two of the three rays used to find the image position are shown. Which of the following best describes the third (missing) ray?​

Answer 1

a

To find the position of the image when an object lies in front of lens, usually three rays are used. One incident ray passes through the focus and would be parallel to the axis after refraction from the lens. Second would just pass through the optical center. Third incident ray would be parallel to the axis and would refract from the lens and pass through the focus on the right hand side. The three rays would be extended in both the directions and we would see where the three rays would intersect. That would be the position of the image.

Step-by-step explanation:

Answer 2

D) A ray incident on a path that would take it through the right focus refracts parallel to the axis.

The question involves the process of ray tracing in physics, specifically in optics, to locate the image formed by a lens or mirror. Typically, three rays are used in ray tracing to locate the image of an object after refracting through a lens or reflecting off a mirror. The three principal rays that are used for this purpose are:

A ray parallel to the principal axis that refracts through the lens and passes through the focal point on the other side.
A ray that passes through the center of the lens without changing direction.
A ray that passes through the focal point and then refracts parallel to the principal axis after passing through the lens.
While three rays are usually shown for clarity, only two are necessary to locate the point where the image will form. The third (missing) ray in the diagram would be one that is not already represented and follows the simple ray-tracing rules outlined.