Question

The rays are parallel to the principal azis of a spherical mirror actually meet at a point 20cm distant from its pole.Identify the mirror and give its focal length.PLSS ANS THIS QUE

Answer 1

Hi.

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..


Hope this helps u!

Answer 2

The mirror is concave and it's focal length is 20 cm.
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