what makes things dark or light - like why can we not see in the dark?

Answer 1

In a beam of light there are spectrums of color each radiate a form of energy. Our eye is a sensor that can detect that energy. Our brain translates that energy into what we call color. Ever see a prism? you have Red, the Orange, then Yellow, then Green, then Blue, and then violet (in that order). There are two other colors that are slightly off the spectrum that can even be dangerous to you... On the Red side there is Infra-red... on the Violet side, there is Ultra-violet... ever hear of them?

At any rate, it takes energy to make light... like the sun, or a lightbulb. That energy relfects or better yet gets absorbed by the matter around us. What doesn't get absorbed reflects back to our eyes so that we can see it. When it's dark, there's no energy to reflect onto your eyes. Heat vision works sorta the same way, but the energy it uses is thermo rather than radiant light... Ever see the movie preditor? The alien saw in thermo vision, and could thus see in the dark.

Answer 2

things are not dark and light.. things are always the same.. how you see them depends on the amount of light or lack of it. you can't see in the dark because of the lack of light. The light is caused from the sun that is a ball of fire that is moved away for night time

Answer 3

You need a source of light to be able to see. Light is reflected from surfaces, darker absorb, lighter reflect better. The structure of some animals eyes have reflective properties which allow them to see in very low light conditions. The only way for us to see in the dark is with FLIR, (forward looking infra-red) gear, which uses thermal signatures of objects.Very effective in low or no light conditions.

Answer 4

They, are not dark. They are colored. However, in the dark, they do not reflect light, and so appear to be black. Or dark. Things are light, or colored, when they reflect light.

I hope I understood your question.

Answer 5

"Things" are niether dark nor light. They only reflect the light that we see which makes them light or dark. Dark is the absence of light.

Answer 6

we need reflected light to c

in dark no light is reflectd \\

hence we an't c