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42.The relation between radius of curvature (R) and focal length (f) of a spherical mirror is (a) R = 2f(b) 2R = f(c) P = 1| (d) R= |
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Answer» Lots of people think it is incorrect to end a SENTENCE in a preposition because, as we've just covered, a preposition is supposed to sit before a noun. (It is, after all, how preposition gets its name.) Therefore, if the preposition is the LAST word in the sentence, it can't sit before anything. So, there's some logic to this ruling, which many people FOLLOW. However, this issue is far more complicated than many realise, and the best WAY to summarize it is by saying that, in the overwhelming majority of cases, it's perfectly acceptable - from a grammatical PERSPECTIVE - to end a sentence in a "preposition." (I'll explain the quotation marks later.) |
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