An optical device X has focal length −30 cm. X can be:

Question

An optical device X has focal length −30 cm. X can be: — Exam MCQ

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B. Either a concave lens or concave mirror — Both a concave lens and a concave mirror have negative focal lengths under the standard Cartesian convention.

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A. Either a convex lens or convex mirror

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C. Either a convex lens or concave mirror

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D. Either a concave lens or convex mirror

An optical device X has focal length −30 cm. X can be:

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