1.

A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be(a) both concave(b) both convex(c) the mirror is concave and the lensis convex.(d) the mirror is convex, but the lensis concave. ​

Answer»

I THINK it's option A- both concaveThis is because CONCAVE LENS or concave MIRROR has always negative focal length.If it HELPED you, please ask as BRALINEST ANSWERThanks!



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