why eyes' pupil are black?

Question

plz help me....
i had this question in my graduating exam , and i want to know what is the right answer?
why eyes' pupil are black?

Answer 1

There are two reasons.
First, there is a choroid layer that has a black color pigment on it.
Secondly, the light entering the eye through the pupil is not reflected. if no light is reflected then from your prespective,(assump you are looking into the eye of somebody else), the light that enters the other persons eye does not reflect back and enter your eye and initiate an action potential in the rods or cones on the retina, so what you see is a black colour.

Answer 2

Pupil has no colour. Not even black. It is transparent and light entering the pupil is not reflected back. Hence the appearance of darkness or black.

Answer 3

because the pupil is acctually a hole. and light only goes into the eye, not out, so it looks like it is black, if you shine a light into the eye though (like a camera flash) the eye seems to look red due to the blood and retina at the back of the eye.

Answer 4

black-looking aperture, the pupil, that allows light to enter the eye (it appears dark because of the absorbing pigments in the retina).

Answer 5

the pupil is not black. it is an opening in the eye . i looks black because it is an enclosed space similar to an enclosed box or tube with only one way for light to enter or exit

Answer 6

It appears black because most of the light entering the pupil is absorbed by the tissues inside the eye

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Answer 7

this is because the pupil absorbs all light falling on it and appears black

Answer 8

They are not black, They are simply and opening into the inner eye, and appear black.