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CBSE Class 10 Answered

a spherical mirror and a spherical lens both have a focal length of -15 cm. identify the type of lens and mirror and justify your answer.
Asked by Shantanu | 12 Feb, 2012, 06:32: PM
Expert Answer
since the focal length is negative i.e. f=-15 cm ,the spherical lens is concave lens  as the focal length is negative for diverging lens and in case of mirrors, it is convex mirror where the focal length is negative.
Answered by | 12 Feb, 2012, 09:46: PM
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