what is focus on convex and concave?
Asked by Milind Shrivastava | 21st Apr, 2012, 10:36: PM
THe rays coming parallel to the principal acis , when incident on the concave mirror , they get reflected and meet at a point on the principal axis and that point is taken as focus.The rays move together there must be two rays to meet . There is no concept of first ray.
Answered by | 21st Apr, 2012, 10:45: PM
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