Sarthaks Test
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Draw the ray diagram to show the Formation of Image by a Concave Mirror. When the Object Is at the Focus.

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Here, we consider a ray of light which is parallel to the principal axis and another ray passing through the centre of curvature. The ray which is parallel to the principal axis passes through the focus and the ray which passes through the centre of curvature retraces its path. The reflected rays are parallel to each other, and would meet only at infinity i.e., the image is formed at infinity and it is a real, inverted and enlarged.

The image is at infinity

Real

Inverted

Magnified

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