Chapter 1, Problem 1C.1E

(a)

Interpretation Introduction

Interpretation:

The wavelength for the transition for hydrogen atom from fifth energy level to forth energy level has to be determined.

Concept Introduction:

Energy separation between the neighboring levels can be calculated using following equation.

    $E_{n+1}-E_n=\left(2n+1\right)\frac{h^2}{8m{L}^2}=h\nu$

The frequency $\left(\nu \right)$, wavelength $\left(\lambda \right)$ and velocity of light $\left(c\right)$ are related by following equation.

    $\lambda =\frac{c}{\nu }$

(b)

Interpretation Introduction

Interpretation:

The wavelength for the transition for hydrogen atom from forth energy level to third energy level has to be determined.

Concept Introduction:

Refer to part (a).