In this problem, we'll use the expression of the energy of an electromagnetic wave.
The energy of an electromagnetic wave:
E = hf = hc/λ where h is Plank's constant, f is the frequency, c is the speed of light, and λ is the wavelength.
Relationship between eV and J:
1eV = 1.6 × 10-19 J
Rod cells in the retina of the eye detect light using a photopigment called rhodopsin. 1.8 eV is the lowest photon energy that can trigger a response in rhodopsin.
1. What is the maximum wavelength of electromagnetic radiation that can cause a transition? (in nm)
2. In what part of the spectrum is this? (visible light, infrared, x-ray, or ultraviolet)
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