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MHT CET202121 Sep 2021Morning ShiftChemistryStructure of AtomActual

The wavelength of a spectral line of caesium is 460 ~nm . What is the frequency of spectral line?

Options

  1. A4.5 10^8 ~Hz
  2. B6.5 10¹⁴ ~Hz
  3. C3 10^9 ~Hz
  4. D5.6 10¹⁴

Correct answer

B. 6.5 10¹⁴ ~Hz

Step-by-step solution

aligned & v= c (1 ~nm =10⁻⁹ ~m ) & = 3 10^8 460 10⁻⁹ & =6.5 10¹⁴ ~Hz aligned

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