In the figure shown the radius of curvat...

In the figure shown the radius of curvature of the left `&` right surface of the concave lens are `10cm` & `15 cm` respectively. The radius of curvature of the mirror is `15 cm` . equivalent focal length of the combination is

the system behaves like a convex mirror of focal length `18 cm`

the system behaves like a concave mirror of focal length `18 cm`

the system behaves like a convex mirror of focal length `36 cm`

the system behaves like a concave mirror of focal length `36 cm`

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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-2

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