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For a concave mirror, when the object is placed exactly at the focus, the image is formed
Aat the focus
Bat infinity
Cat the pole
Dbetween F and C
Answer & Solution
Correct answer: B. at infinity
1. Rays from an object at F become parallel to the axis after reflection.
2. Parallel reflected rays never meet at a finite distance.
3. So the image is said to form at infinity, highly enlarged.
_Source: AP/TS SCERT Class 10 Physical Science, "Reflection of Light at Curved Surfaces"_
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