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Does the colour of our eyes make any difference?

What benefits do people have by possessing eyes of different colours? (Apart from being able to tell the person's race or having different variety.)
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Categories: Human Body.

Tags: Eyes, Colours.

 

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Why does it feel so horrible to read red text on green background...

or any text on any beckground that is not darker or brighter but just another colour?

Are the cones somehow less fit for reading than the rods?

No one minds looking for red cherries among green leaves.
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Last edited on: 2011-01-19 17:14:51

Categories: Human Body.

Tags: colour, eye.

 

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Out of the blue

I washed some apples and served them on a hand-carved soapstone platter (see photo). When we began to eat them, we noticed the apples had left blue stains on the plate. What could have caused this?

Tony Wills, London, UK
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Categories: Domestic Science.

Tags: plants, physics, colour, Biology, stain, apple.

 

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The half of it

In among several perfectly normal sweet potatoes, we came across this rather oddly coloured specimen (see photo). Although all the others were orange, only half of this one had complied, the other half being white. Can anyone explain why this should be and how it happens so perfectly down the length of the vegetable?

Josh Wainwright, Danbury, Essex, UK

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Last edited on: 2010-12-08 16:24:27

Categories: Domestic Science.

Tags: colour, sweetpotato.

 

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WHY do some chemical reactions of two colourless reagents produce a product with colour?

Eg: N2(colourless gas)+O2(colourless gas)=NO2(brown coloured gas)

 
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  • Asked by l3irus
  • on 2010-11-30 23:08:19
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Last edited on: 2010-12-01 12:29:49

Categories: Unanswered.

Tags: chemistry, colour, science, experiment, chemicalreaction.

 

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Mirrors

What colour would mirrors be classified as?
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  • Asked by ugin112
  • on 2010-11-22 16:08:45
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Categories: Domestic Science.

Tags: Colours, mirrors.

 

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How do the eyes see colour?

From what i think i understand about the way the eye works, we have cells which can identify either red, blue or green light, which i guess corresponds to a certain wavelength (475nm, 510nm, 650nm), yet yellow light, for example, has a wavelength of 570nm. Is this picked up only partially by red and green receptors? If this is the case, technology using 3 colours of pixels in screens must be perfectly adapted to human eyes, yet a new type of television has been released with a yellow pixel as well. Would that offer any advantage to colour perception, or is it just smoke and mirrors?
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Categories: Human Body.

Tags: colour, energy, perception, wavelength, eye, photons, Spectrum.

 

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Why do rainbows always occur in arcs?
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Categories: Weather .

Tags: Rain, Rainbows, Colours, Spectrum, Arcs, Raindrops.

 

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Space is colour full or black and white ?

whenever I see nasa's space pictures I saw them colourfull but on other things like the video of astroids hittng the planet looks like black and white , why is it so?

 

I tried things on nasa website, they say bla bla about our eye sight and earth environment and light 7 rays. I don't understand.
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Categories: Our universe.

Tags: Space, light, Universe, colour.

 

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Is it possible to test for tetrachromatic vision on a trichromatic display?

I read about the possibility of people having tetrachromacy and would like to know if a test similar to a Ishihara is possible on a standard RGB display.
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  • Asked by mb4coco
  • on 2010-11-08 12:00:18
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Categories: Human Body.

Tags: Eyes, colour, Vision.

 

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