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Questions  >>  SAT  >>  Chemistry  >>  Atomic Structure
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Q)

Calculate wave number of yellow radiations having wavelength of 5800 A0 .

$\begin{array}{1 1}(a)\;1.72 \times 10^6 m^{-1}\\(b)\;1.32 \times 10^6 m^{-1}\\(c)\;2.72 \times 10^6 m^{-1}\\(d)\;0.72 \times10^6 m^{-1}\end{array}$

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A)
$Wave\; number =\frac{1}{ wave\;length }$
$Wave\;length = 5800 A^0 = 5800 \times10^{-10} m $
$Wave\; number = \frac{1}{5800 \times 10^{-10} {m}}$
$= 1.72 \times 10^6 m^{ -1}$
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