Geth Hunter Alpha wrote...
Wave nature relevent as it is wavelenght that determins what part of spectrum light falls into. Visible light only very very small portion of light wave spectrum.
Once again, what is your point?
If the light being reflected by the cat's eye were outside the visible spectrum we wouldn't see it anyway and the cat's eyes wouldn't glow.
Also, just do you know, the wave nature of light is an explanation for color, but it is not important to describing the behavior of light in that circumstance. When you talk about the importance of light's wave nature, you're typically describing cases where the effects like diffraction, dispersion, or interference are happening. Those are the only calculations where the light's wavelength/frequency has an effect on the outcome.
Simple reflection is not wavelength dependent, and color can be described on it's own terms without referencing wavelength -- which is to say that you don't need to know the wave nature of light to understand that light exists in a spectrum that extends beyond the visual range, or even to describe that spectrum.
Particle nature makes light diffuse otherwise it would be pitch black at bottom of steps which it clearly is not as i can easily see objects beside the cat as well as the cat itself.
I didn't say it was pitch black. I just pointed out that the extremely high reflectivity of the tapetum can make the eyes glow very brightly, even in the absense of much light. Obviously if it was PITCH black, there would be no light to reflect.
Honestly I don't even know why we're arguing about this. I feel like my point was pretty straightforward and obvious. What is it that you're objecting to?