(c) (i) A lens combination consists of a convex lens of focal length 30\ cm and a concave lens of focal length 15\ cm placed together. Find the equivalent focal length and power of this lens combination.

(c) (i) A lens combination consists of a convex lens of focal length 30\ cm and a concave lens of focal length 15\ cm…

CBSE Class 10 Science PYQ · Light: Reflection and Refraction · Lens formula, magnification, power of a lens · 2 Marks · March 2026 · Standard

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202 Marks · March 2026 · Standard

(c) (i) A lens combination consists of a convex lens of focal length $30\ \text{cm}$ and a concave lens of focal length $15\ \text{cm}$ placed together. Find the equivalent focal length and power of this lens combination.

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(c) (i) A lens combination consists of a convex lens of focal length 30\ cm and a concave lens of focal length 15\ cm…

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