Physics Circle home Student Login

Home›Chapters›Atomic Structure PYQs›Energy of the Electron & Energy Levels›Question 62

NEET 1990 (AIPMT) · Energy of the Electron & Energy Levels

Energy of the Electron & Energy Levels question from NEET 1990 (AIPMT)

Q62NEET 1990 · AIPMTMedium

Energy of the Electron & Energy Levels

Energy levels A, BA,\ B and CC of a certain atom corresponding to increasing values of energy i.e. EA<EB<ECE_{A} < E_{B} < E_{C}. If λ1, λ2\lambda_{1},\ \lambda_{2} and λ3\lambda_{3} are wavelengths of radiations corresponding to transitions CC to B, BB,\ B to AA and CC to AA respectively, which of the following relations is correct?

Show answer and solution

Answer: (b)

  1. Energies add: EC−EA=(EC−EB)+(EB−EA)E_C - E_A = (E_C - E_B) + (E_B - E_A).
  2. With E=hcλE = \frac{hc}{\lambda}: 1λ3=1λ1+1λ2\frac{1}{\lambda_3} = \frac{1}{\lambda_1} + \frac{1}{\lambda_2}
  3. λ3=λ1λ2λ1+λ2\lambda_3 = \frac{\lambda_1\lambda_2}{\lambda_1+\lambda_2}
  4. So the answer is (b).
Report a mistake

More questions on Energy of the Electron & Energy Levels