Question

where concave mirror generally use...​

Answer 1

Concave mirrors are widely used in headlights of automobiles and motor vehicles, torchlights, railway engines, etc. as reflectors.

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Answer 2

Explanation:

When an object is placed anywhere between the optical centre and infinity , the image formed by a concave lens lies in between principal and focus and optical center on the same side of the lens . concave mirror are used in street light, etc