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Questions  >>  SAT  >>  Chemistry  >>  Atomic Structure
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Calculate wave number of yellow radiations having wavelength of $5800\; A_0$ .

$\begin{array}{1 1} (a)\; 1.72 \times 10^{6} m {-1} \\ (b)\; 1.12 \times 10^{6} m {-1} \\ (c) \; 2.72 \times 10^6 m ^{-1} \\ (d)\; 1.62 \times 10^6 m ^{-1} \end{array} $

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A)
Solution :
Wave number = 1/ wavelength
Wavelength $= 5800 A_0$
$\qquad= 5800 \times 10^{-10} m $
Wave number $= 1/5800 \times 10^{-10} m = 1.72 \times 10^6 m ^{-1}$
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