Wave number for a radiation having 5800 wavelength is . The value of is ____________ . (Integer answer)

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Solution

Q.
Wave number for a radiation having 5800 $Å$ wavelength is $x \times 10 c m^{- 1}$ . The value of $x$ is ____________ . (Integer answer) [2024]

Ans.
(1724) $Wave number (\bar{ν}) is reciprocal of wavelength (λ) .$

$\bar{ν} = \frac{1}{λ} = \frac{1}{5800 Å} = \frac{1}{5800 \times 10^{- 8} cm} = 1724.138 \times 10 {cm}^{- 1}$

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