is grass really red?

Question

Well in shcool I remember learning that the color you see, like green from grass is actualy the reflection of light that is not absorbed by the grass,and that is why you see red after looking at a green dot for 5 min.

So does that mean that grass is actualy red?

Answer 1

no, we define the color of something by what light if reflects not by what light it absorbs. in order to have color, you need something to process the light. so if nothing is there to see it, there is no color. also, if there is no light to be reflected, there is no color. grass is not green unless there is light reflecting off it. at night, grass is not green. just look at grass at night (when there is no moon or street lights) you call that green? sure if you hold a flashlight to it it's green but without it it's not.

Answer 2

Color Vision! Physics my dear...
Color and Light is quite fascinating! Here's a little explanation.....

Color vision is the capacity of an organism or machine to distinguish objects based on the wavelengths (or frequencies) of the light they reflect or emit. The nervous system derives color by comparing the responses to light from the several types of cone photoreceptors in the eye. These cone photoreceptors are sensitive to different portions of the visible spectrum. For humans, the visible spectrum ranges approximately from 380 to 750 nm, and there are normally three types of cones. The visible range and number of cone types differ between species.

A 'red' apple does not emit red light. Rather, it simply absorbs all the frequencies of visible light shining on it except for a group of frequencies that is perceived as red, which are reflected. An apple is perceived to be red only because the human eye can distinguish between different wavelengths. Three things are needed to see color: a light source, a detector (e.g. the eye) and a sample to view.

The advantage of color, which is a quality constructed by the visual brain and not a property of objects as such, is the better discrimination of surfaces allowed by this aspect of visual processing.

In order for animals to respond accurately to their environments, their visual systems need to correctly interpret the form of objects around them. A major component of this is perception of colors.

.... Grass? Red? It's all in the eye of the beholder! :)

Answer 3

You see red after looking at a green dot because of an afterimage. An afterimage is an illusion that you get when you look at something for too long.

Grass is green, but if you stare at a big patch of it, it won't turn red, because the green area is way too large for it.

Answer 4

no grass is green as you can see
and you already gave the answer that the red light is absorbed

Answer 5

I know blood is supposed to be blue till it hits the air and becomes red.
You've got me looking for a green pen now to put a dot to stare at.

Answer 6

Nope grass is green

Answer 7

No! Gosh, what school did you go to? Everyone knows that chlorophyll is green and that's what makes grass and other plants green.

Answer 8

grass is green are u weird come on every one knows it photocintasis

Answer 9

no ! but Polar bears are not really white, their coats appear white from the snow's reflection, their skin is black and the sky is really purple, but blue what our eyes are capable of seeing.

Answer 10

you see it's really interesting. for example, dogs see the world in different color then people.:) i often think about this question...but i think how Einstein say:"everything is relatives" is the best ansewer for this question:)