A spherical mirror and a thin spherical lens have a focal length of +25cm each (in new Cartesian sign convention). The mirror and lens are likely to be -

Asked in Head Master Praveshika School (Sanskrit Edu.) 2021 · Topic: Optics (Reflection and Refraction at plane and spherical surfaces)

1. The mirror is convex and the lens is concave
2. The mirror is concave and the lens is convex
3. Both concave
4. Both convex

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