a prism is just able to resolve sodium ylow lines 589nm and 589.6 nm . Calcukate the resolving power
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Explanation:
Given wavelengths of two sodium spectral lines are 589nm and 589.6 nm;
The mean wavelength is
λ = 589+589.6 ÷ 2 = 589.3
The change in wavelength is
dλ = 589 .6- 589 = .6
Now the resolving power will be
R = λ / dλ = 982.2
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