The figure shows the energy levels of a certain atom. When the electron de-excites from $3E$ to $E$,an electromagnetic wave of wavelength $\lambda$ is emitted. What is the wavelength of the electromagnetic wave emitted when the electron de-excites from $\frac{5E}{3}$ to $E$?

  • A
    $3\lambda$
  • B
    $2\lambda$
  • C
    $5\lambda$
  • D
    $\frac{3\lambda}{5}$

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