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An image Y is formed of a point object x...

An image Y is formed of a point object x by a lens whose optic axis is AB as shown in Figure. Draw a ray diagram to locate the lens and its focus. If the image Y of object X is formed by a concave mirror (having the same optic axis AB) instead of lens, draw another ray diagram to locate the mirror and its focus. Write down the steps of construction of the ray diagrams.

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a. When a convex lens is used to form image of X at Y:
i. A ray starting from X parallel to the optic axis passes through the second focus.
ii. A rays starting from X directed towards the optic axis passes undeviated.
Both the rays meet at Y, which is the real image of X.
b. When a concave mirror is used to form image of X and Y:
i. A ray starting from X parallel to the optic axis passes through principal focus F.
ii. A ray starting from X, directed towards the center of curvature C, falls normally on the mirror and retraces its path.
Both the rays meet at Y, which is the real image of X.

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