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MHT CET202013 Oct 2020Morning ShiftPhysicsAtomic PhysicsActual

When an electron in a hydrogen atom jumps from the third orbit to the second orbit, it emits a photon of wavelength ^ . When it jumps from the fourth orbit to third orbit, the wavelength emitted by the photon will be

Options

  1. A20 13
  2. B16 25
  3. C9 16
  4. D20 7

Correct answer

D. 20 7

Step-by-step solution

aligned 1 &=R ( 1 2² - 1 3² )=R ( 1 4 - 1 9 )= R 5 36 1 ^ &=R ( 1 3² - 1 4² )=R ( 1 9 - 1 16 )=R 7 144 ^ &= 5 36 144 7 = 20 7 ^ &= 20 7 aligned

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