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MHT CET20228 Aug 2022Evening ShiftPhysicsAtomic PhysicsActual

If an electron in hydrogen atom jumps from 3^ rd orbit to 2^ nd orbit, it emits a photon of wavelength ' '. When it jumps from 4^ th orbit to 3^ rd orbit, the corresponding wavelength of the photon will be

Options

  1. A20 13
  2. B20 7
  3. C9 16
  4. D16 25

Correct answer

B. 20 7

Step-by-step solution

Rydberg's relation is given by 1 = R _ H Z ^2 ( 1 n ₁^2 - 1 n ₂^2 ) For hydrogen, Z =1 . Given, for 3^ rd to 2^ nd orbit transition And for 4^ th to 3^ rd orbit transition Taking ratio of eqn (1) & (2) aligned & _n = 5 36 (16 9) 7 = 20 7 & _n= 20 7 aligned

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