An interchangeable-lens camera has its image sensor fixed 4.0 cm behind the lens mount

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

Problem

An interchangeable-lens camera has its image sensor fixed 4.0 cm behind the lens mount. To bring very distant mountains into sharp focus, which focal length lens should the photographer select? (a) 6.0 cm6.0\ \text{cm} (b) 2.0 cm2.0\ \text{cm} (c) 4.0 cm4.0\ \text{cm} (d) 3.0 cm3.0\ \text{cm}

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