How do you use a ray diagram?
1. Pick a point on the top of the object and draw two incident rays traveling towards the mirror. Using a straight edge, accurately draw one ray so that it passes exactly through the focal point on the way to the mirror. Draw the second ray such that it travels exactly parallel to the principal axis.
What are the important rays to make a ray diagram?
The “three principal rays” which are used for visualizing the image location and size are: A ray from the top of the object proceeding parallel to the centerline perpendicular to the lens. Beyond the lens, it will pass through the principal focal point.
Which rays are selected for drawing ray diagrams?
To construct a ray diagram, we use two light rays which are so chosen that it is easy to know their directions after reflection from the lens. List these two rays and state the path of these rays after refraction. Use these two rays to locate the image of an object placed between ‘F’ and ‘2F’ of a convex lens.
What is convenient Ray?
A ray of light passing through the first principal focus (for a convex lens) or appearing to meet at it (for a concave lens) emerges parallel to the principal axis after refraction.
Which are the two convenient rays that are chosen?
Two convenient rays that are chosen to construct the image by a spherical mirror for a given object: A ray passing through the centre of curvature:A ray of light passing through the centre of curvature of a concave mirror or a ray directed in the direction of centre of curvature of a convex mirror is reflected back …
What are the three convenient rays which are drawn to construct the ray diagram of a lens?
(i) A ray of light incident at the optical centre O of the lens passes undeviated through the lens. (ii) A ray of light incident parallel to the principal axis of the lens, after refraction passes through the second focus F2 (in a convex lens) or appears to come from the second focus F2 (in a concave lens).