Problem: We shine light of three different wavelengths—325 nm, 455 nm, and 632 nm —on a metal surface. We record the following observations for each wavelength, labeled A, B, and C:Observation A: No photoelectrons were observed.Observation B: Photoelectrons with a kinetic energy of 155 kJ/mol were observedObservation C: Photoelectrons with a kinetic energy of 51 kJ/mol were observedWhich observation corresponds to which wavelength of light?

FREE Expert Solution

For this problem, we have to determine which observation corresponds to which wavelength of light

 Recall that the energy of a photon is given by:



We can see that energy and frequency are directly proportional. The energy in a transition also depends on the distance between the energy levels.


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Problem Details

We shine light of three different wavelengths—325 nm, 455 nm, and 632 nm —on a metal surface. We record the following observations for each wavelength, labeled A, B, and C:
Observation A: No photoelectrons were observed.
Observation B: Photoelectrons with a kinetic energy of 155 kJ/mol were observed
Observation C: Photoelectrons with a kinetic energy of 51 kJ/mol were observed

Which observation corresponds to which wavelength of light?

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