एक वस्तु को एक अवतल दर्पण के सामने उसकी फोकस दूरी के बराबर दूरी पर रखा जाता है। प्रतिबिंब कहाँ बनता है?

To accurately locate the image of an extended object formed by a spherical mirror using a ray diagram, what is the minimum number of reflected rays that must intersect (or appear to intersect)?

For a convex mirror, where is the centre of curvature located?