Our Perception of Light (for an article)

[MabuyaQ]

Where is the article:)

https://www.reef2reef.com/ams/where-does-your-tank-receive-more-light.592/

Actually that is not the question - but it is interesting that you thought of a second question:)

The point is that it could be the question because no where is stated how many light sources there are and of what type. I won't be able to see any light casted by a (near)UV light or (near)IR light because my eyes can't see UV and IR, therefore also not the effect a shadowcasting object has on this type of light after it is reflected. Square B could be blasted with both IR and UV whilst square A would be protected in the shadow of the green cylinder, so which is lighted more intensely, A or B? We are all tricked by our brains in believing there is only one light source because we only see one shadow. And what about the effect of fluoresence on color perception? For all we know the light squares are fluorescent and the dark ones not, take away the right spectrum of light and they all have the same color.

Don't trust your eyes, they have never seen reality and they never will.

 

[MnFish1]

https://www.reef2reef.com/ams/where-does-your-tank-receive-more-light.592/



The point is that it could be the question because no where is stated how many light sources there are and of what type. I won't be able to see any light casted by a (near)UV light or (near)IR light because my eyes can't see UV and IR, therefore also not the effect a shadowcasting object has on this type of light after it is reflected. Square B could be blasted with both IR and UV whilst square A would be protected in the shadow of the green cylinder, so which is lighted more intensely, A or B? We are all tricked by our brains in believing there is only one light source because we only see one shadow. And what about the effect of fluoresence on color perception? For all we know the light squares are fluorescent and the dark ones not, take away the right spectrum of light and they all have the same color.

Don't trust your eyes, they have never seen reality and they never will.

Thanks for the article. as to your other point - it depends on what you mean by 'which is lighted more intensely'. Since we can't see UV radiation or IR radiation. To me lighted meant 'visible light spectrum' - In that case - you can believe what your eyes are seeing. But - if you want to throw in the possibility of UV, IR, sources - sure its possible - but IMHO - the way the question is worded suggests they were focusing on visible light rather than 'radiation' in general but its an interesting point.

 

[Sir Chris]

Where would be the source of light coming from and how close.
Seems B if it’s angled from backside