Lenses?have two focal points, one on either side?of?the?lens. A?concave mirror?converges light to a focal point.For lenses, light converges to a pointfor?a?convex lens. A?convex mirrordiverges light, as does a?concave lens. Hope it might help you!!
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R. Devatharshini answered this
A spherical mirror is reflecting surface while a spherical lens is a refracting surface
