A spherical mirror and a spherical lens each have a focal length of -10 cm. The mirror and the lens are likely to be- both concave
- both convex
- the mirror is concave and the lens is convex
- the mirror is convex and the lens is concave
(a) both concave
Explanation
Here, the focal length is given with a negative sign(-10), and both the concave lens and the concave mirror has a negative focal length.
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