Question

The frequency of radiation absorbed or emitted when transition occurs between tow stationary states with energies $E_{1}$ (lower) and $E_{2}$ (higher) is given by

• A. $\upsilon = \frac{E_{1} + E_{2}}{h}$
• B. $\upsilon = \frac{E_{1} - E_{2}}{h}$
• C. $\upsilon = \frac{E_{1} \times E_{2}}{h}$
• D. $\upsilon = \frac{E_{2} - E_{1}}{h}$

Answer 1

Answer: (D)

$\upsilon = \frac{E_{2} - E_{1}}{h}$

Answer 2

: $\upsilon = \frac{\Delta E}{h}$ or $\frac{E_{2} - E_{1}}{h}$

Where $E_{1}$ and $E_{2}$ are the energies of the lower and higher energy states respectively.