a) The graph shows the photon emission spectrum for a molecule, i.e., the intens
ID: 1997443 • Letter: A
Question
a) The graph shows the photon emission spectrum for a molecule, i.e., the intensity of the emitted light versus the wavelength.Which one of the following statements is true?
- The higher the wavelength of a peak, the higher the energy of the corresponding electron state.
- The lower the wavelength of a peak, the higher the energy of the corresponding electron transition.
- The smaller the wavelength difference between two peaks, the higher the energy difference between the corresponding electron states.
- The higher the intensity of a peak, the higher the energy of the corresponding electron state.
- The higher the intensity of a peak, the higher the energy of the corresponding electron transition.
b) What is the energy of the lowest energy transition shown?
100 80.. 60F. 40 20 400 450 500 550 600 650 700 Wavelength [nm]Explanation / Answer
a) The second option is correct.
The lower the wavelength of a peak, the higher the energy of the corresponding electron transition.
b) The lowest energy transition will have the maximum wavelength. From the plot, the peak with maximum wavelength is at about (lambda =) 690 nm.
E= hc/lambda
=1.8 eV
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