- #1
DanielMB
- 24
- 12
Our Vision System should be sensitive to one specific term, they do not mean the same, one is related with geometry factors (wavelength) while the other is related with beating stimuli (pulse)
The frequency of light (f) is constant from media to media, the same as it is in vacuum, wavelength is modified by the refractive index of each media, the same happens for the speed of light
Light into the eyeball travels through the Vitreous Humour (VH) until reaching photoreceptors distributed in the retina, considering a VH refractive index of n = 1.34, and being speed of light in vacuum Co (about 300,000 Km/sec), light wavelength (L) can be calculated (for each frequency) as :
L = Cv / f = 1.34 Co / f
It sounds like: Which came first, the chicken or the egg?
A priori, seems to be equivalent to say that our vision system is sensitive to frequencies or wavelengths, because they are related into our eye through an almost-constant factor (the VH refractive index)
But, Does aging alter the VH refractive index, causing hue perception shifting? If it doesn’t, our vision system could be sensitive to frequency, not to wavelength (I don’t know the answer)
Should I consider another key point as Energy transport and absorption?
In the retina an opsin molecule absorbes a photon and transmits a signal to the photoreceptor cells, the energy of each photon (quantum of light) is absolutely determined by its frequency, not the wavelength
Is it the opsin capacity to absorbe a photon and transmit a proportional signal to the photoreceptors that decides the question? If it is, this mechanism is function of the frequency, not the wavelength
Please, could you help me with this dilemma?. Thanks
The frequency of light (f) is constant from media to media, the same as it is in vacuum, wavelength is modified by the refractive index of each media, the same happens for the speed of light
Light into the eyeball travels through the Vitreous Humour (VH) until reaching photoreceptors distributed in the retina, considering a VH refractive index of n = 1.34, and being speed of light in vacuum Co (about 300,000 Km/sec), light wavelength (L) can be calculated (for each frequency) as :
L = Cv / f = 1.34 Co / f
It sounds like: Which came first, the chicken or the egg?
A priori, seems to be equivalent to say that our vision system is sensitive to frequencies or wavelengths, because they are related into our eye through an almost-constant factor (the VH refractive index)
But, Does aging alter the VH refractive index, causing hue perception shifting? If it doesn’t, our vision system could be sensitive to frequency, not to wavelength (I don’t know the answer)
Should I consider another key point as Energy transport and absorption?
In the retina an opsin molecule absorbes a photon and transmits a signal to the photoreceptor cells, the energy of each photon (quantum of light) is absolutely determined by its frequency, not the wavelength
Is it the opsin capacity to absorbe a photon and transmit a proportional signal to the photoreceptors that decides the question? If it is, this mechanism is function of the frequency, not the wavelength
Please, could you help me with this dilemma?. Thanks