Which of the following form(s) a virtual and erect image for all positions of the object?

PHYSICS · Single correct · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction

Problem

Which of the following form(s) a virtual and erect image for all positions of the object? (1) Convex lens (2) Concave lens (3) Convex mirror (4) Concave mirror.

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