Q- What is the image formation by a concave mirror when object placed at infinity in front of concave mirror ?
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(a) Object at infinity:- Since parallel rays coming from the object converge at principal focus, F of a concave mirror; after reflection. Hence, when the object is at infinity the image will form at F. Real and inverted.
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When an object is at infinity from a concave mirror, the image formed is at the focus and highly diminished.
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