Physics, asked by Likhith7231, 10 months ago

A rayparallel to principal axis of spherical mirror 15 ditant from pole

Answers

Answered by kumarisangita

Answer:

The mirror is concave mirror and its focal length is -20cm because only in concave mirror the rays actually intersects and when the rays are parallel they meet at the focus. hence the focal length is -20cm....

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