Atoms And Nuclei Question 105

Question: The wavelength of yellow line of sodium is 5896 Å. Its wave number will be [MP PET 2001]

Options:

A) 50883 × 1010 per second

B) 16961 per cm

C) 17581 per cm

D) 50883 per cm

Show Answer

Answer:

Correct Answer: B

Solution:

Wave number $ \bar{\nu }=\frac{1}{\lambda } $ $ =\frac{1}{5896\times {{10}^{-8}}}=16961 $ per cm



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