HorizonGirl From Canada, joined Mar 2005, 808 posts, RR: 15 Posted (8 years 4 months 3 weeks 2 days 3 hours ago) and read 2148 times:
I know this may seem like a strange question to be asking, but something has been
bugging me lately. Last year in grade 10, we were talking about how our eyesight
works in science. We learned that coloured objects appear that colour because they absorb
all colours of light, except they reflect the one colour they don't absorb.
The object is the colour of light it reflects. Black absorbs all colours of light.
Are our pupils black so they can absorb all colours of light?
And if they were another colour, say, blue, would we not be able to see that colour because
our eyes couldn't absorb it?
Hopefully this makes a little sense!
Yellowstone From United States of America, joined Aug 2006, 3071 posts, RR: 4
Reply 2, posted (8 years 4 months 3 weeks 2 days 3 hours ago) and read 2135 times:
Your pupils appear black for the same reason that, if you poke a small hole in a box and look through it, the inside will look black, whatever color it actually is. The pupil is transparent, and not enough light gets through to illuminate the inside. That's why doctors have that device to shine a light into your eye, so they can take a look in through your pupil.
Hydrogen is an odorless, colorless gas which, given enough time, turns into people.
Aloges From Germany, joined Jan 2006, 9087 posts, RR: 41
Reply 4, posted (8 years 4 months 3 weeks 1 day 21 hours ago) and read 2093 times:
Quoting Yellowstone (Reply 2): The pupil is transparent, and not enough light gets through to illuminate the inside. That's why doctors have that device to shine a light into your eye, so they can take a look in through your pupil.
What they see with that is the back of the eye, I'd call the colour yellow-ish. And then you have the blood vessels.
Walk together, talk together all ye peoples of the earth. Then, and only then, shall ye have peace.
There is a layer in the retina which is black. It is very thin, so when you shine a strong light into it, you see the blood vessels and the fatty layer behind this layer. If you were to open up an eye, the retina would appear black. (I've done this type of dissection on a cow's eye.)