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Regarding mirrors, consider these statements: (I) the minimum mirror size to see your own full-length reflection is half your own height, (II) a convex mirror always forms a virtual, erect, diminished image, (III) the laws of reflection hold true for every reflecting surface, and (IV) a plane mirror’s focal length is exactly zero. Which are correct?

1. Regarding mirrors, consider these statements: (I) the minimum mirror size to see your own full-length reflection is half your own height, (II) a convex mirror always forms a virtual, erect, diminished image, (III) the laws of reflection hold true for every reflecting surface, and (IV) a plane mirror’s focal length is exactly zero. Which are correct?

 

Statements I, II, and III are all genuinely correct. Statement IV is false: a plane mirror’s focal length is infinite, not zero, since its radius of curvature is itself infinite.

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