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Abstract: X-ray flat surfaces utilized in most advanced light sources have posed challenges to achieve form accuracy of PV 2 nm, RMS 0.2 nm and RMS 50 nrad ...
\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.
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