Question

Energy levels, A, B, C, of a certain atom correspond to increasing values of energy i.e., $E_A$ < $E_B$ < $E_C$. If $\lambda_1$, $\lambda_2$, $\lambda_3$ are the wave lengths of radiations corresponding to the transition from C to B, B to A and C to A respectively, which of the following statements is correct ?
(a) $\lambda_3 = \lambda_1 + \lambda_2$
(b) $\lambda_3 = \frac{\lambda_1\lambda_2}{\lambda_1 + \lambda_2}$
(c) $\lambda_1 + \lambda_2 + \lambda_3 = 0$
(d) $\lambda_3^2 = \lambda_1^2 + \lambda_2^2$

Answer 1

Answer:

b) λ3 = λ1λ2/ λ1 + λ2

Explanation:

Total number of atoms = 3 =  A B and C (Given)

Increasing volume of energy - E_A < E_B < E_C (Given)

Wavelengths of radiations - λ1 λ2 and λ3 (Given)

Let the energy in A, B and C state be  EA, EB and EC

Therefore,

= ( Ec - Eb) + ( Eb - Ea ) = ( Ec - Ea) or

= hc/ λ1 + hc/ λ2 = hc/ λ3

= λ3 = λ1λ2/ λ1 + λ2

Therefore, during the transition from C to B, B to A and C to A respectively, the correct statement will be λ3 = λ1λ2/ λ1 + λ2.

Answer 2

iii don't know ooooooooo