Wstawię jeszcze jeden tekst o UV. Nie będę go tlumaczył ale ogólnie chodzi o to źe świecenie latarką UV ma sens i że w pewnych warunkach widzimy UV. Co ciekawe ludzie z afakią widzą UV na co dzień w normalnych warunkach. Jak wygląda świat w UV można obejrzeć w dziełach jednego impresjonisty - pan Claude Monet po operacji katarakty widział w UV. Moźe jeden z forumowych twórców zainspirowałby się jego dziełami i zrobił serię patrągową "Monet"?
W skrócie moźemy widzieć UV ale widzimy je bardzo bardzo słabo. Poniżej tekst Toma Kaya - paleontologa który zajmuje się ewolucją widzenia w kolorze:
Actually most adults up to age 50 or so can see uv down to at least 310 nm (sometimes down to 302 nm). Most people can see infrared at least up to 1064 nm and probably beyond 1152 nm.
At least that's the result of about a dozen vision experiments involving live human test subjects where they actually looked at light at those wavelengths and saw them.
In the ultraviolet color perception fizzles out between 334 nm and 313 nm, while visual acuity at 310 nm is limited to 4 inches. Between 4 and 6 inches objects become increasingly blurry. Beyond 6 inches it's nearly all just a big blur. (Probably the lens not being able to focus.) At 310 things look twice as large and twice as far away as normal, possibly due to the high index of refraction. Between 310 nm and 302 nm things get a lot worse really fast, possibly due to the opacity of the cornea, This is why 310 nm remains the lower limit for much of the human life-span.
From 420nm to 380nm the opacity of the lens increases by about 3.5 orders of magnitude. The lens is only one of several elements known as "ocular media" (others including the cornea, aqueous humor, vitreous humor, etc). Opacity is only one of several elements that effect "transmittance," i.e, how much light actually gets through.
On top of that, we humans lack (as far as is known) any sensory apparatus for detecting either uv or infrared, except the usual rods and cones by which we see ordinary visible light. Thus, whatever we see at extreme wavelengths is just the tail end of the sensitivity range of normal vision.
About the only time you will see uv or infrared is with an exotic light source, such as a laser, lamp with optical filter, monochromator, etc. Even then, the light needs to be substantially more powerful than normal. For example, a 300mW 808nm infrared laser pointer looks about as bright as 1/20mW 650nm red laser pointer.
W Guardianie pisali:
Just because you cannot see UV does not mean it has no effect on your eyes.
https://www.theguard...cience.research
Mam nadzieję że będziecie wrzucać fotki UV do tego wątku
Użytkownik ictus edytował ten post 26 styczeń 2017 - 22:41
Prawdopodobnie coś jest na rzeczy.....zresztą wobstrugacze dodają nieco widocznych w UV niuansików w niektórych swoich rękodziełach, tak więc także wierzą 
