What is the value of the frequency of radiation when a transition occurs between two stationary states that differ in energy by $\Delta E$?

  • A
    $v = \frac{\Delta E}{h}$
  • B
    $v = \frac{h}{\Delta E}$
  • C
    $v = \frac{\Delta E}{h^2}$
  • D
    $v = \frac{h}{2 \pi}$

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