Answer :
11.0 cm far from a concave mirror (radius 22.0 cm ) must an object be placed if its image is to be at infinity.
What is concave mirror?
A concave mirror's reflected surface curves inward and outward from the light source. Concave mirrors are used to reflect light inward to the single focus point. Concave mirrors, in contrast to convex mirrors, produce a range of pictures depending on the object's proximity to the mirror.
Briefing:
The picture will be produced at infinity if the item is retained at the focus point. Assuming that the radius of curvature is R=22.0 cm, the focal length is equal to
F = r /2
F = 22.0 / 2
F = 11.0 cm
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