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\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.
Rugby union is no stranger to unintended consequences. The sport’s incessant law tweaks tend to tinker with one area only to open a loophole or inspire a tactical trend somewhere else. In a ...
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