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प्रश्न
Assertion: The focal length of the convex mirror will increase if the mirror is placed in water.
Reason: The focal length of a convex mirror of radius R is equal to `R/2`.
पर्याय
Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
Assertion is true and Reason is false.
Assertion is false and Reason is true.
MCQ
विधान आणि तर्क
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उत्तर
Assertion is false and Reason is true.
Explanation:
The focal length of a convex mirror, which is always half its radius of curvature, is a fixed geometric property of the mirror itself. Placing the mirror in water does not change its physical shape or radius and thus does not alter its focal length.
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