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Asked: 2021-06-14T10:47:31+00:00 In:

As per the cartesian sign convention followed for mirrors and lenses

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66.67%(a) focal length of concave mirror and concave lens is negative. ( 2 voters )
33.33%(b) focal length of concave mirror and convex lens is negative. ( 1 voter )
0%(c) focal length of convex mirror and convex lens is negative
0%(d) focal length of convex mirror and concave lens is negative.
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    1. (a) focal length of concave mirror and concave lens is negative.

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