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KCET2013PhysicsAtomic Physics

The figure shows the energy level of certain atom. When the electron de excites from 3 E to E , an electromagentic wave of wavelength is emitted. What is the wavelength of the electromagnetic wave emitted when the electron de excites from 5 E 3 to E ?

Options

  1. A3
  2. B2
  3. C5
  4. D3 5

Correct answer

A. 3

Step-by-step solution

As electron de excites from 3 E E aligned & & h v &=3 E-E & or & h c &=2 E ...(i) aligned When electron de excites from 5 E 3 E h c ^ = 5 E 3 -E= 2 E 3 ...(ii) Substituting the value of E from Eq. (i) in above equation aligned h c ^ &= 2 3 ( h c ₂ ) ^ &=3 aligned

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