Is it possible to make "darkness" without "absenting the light"?

Question

Darkness is the absence of light.
I was wondering if there is any ( in chemistry, physics, biology) way to make darkness without absenting of light?

Answer 1

Lancenigo di Villorba (TV), Italy

Sorry, I understand about chemistry's troubles.
I think that you obtain darkness also in presence of light's source...I think to heavy and black fumes, as clouds....

I hope this helps you.

Answer 2

Nope.

Think of it this way, though: darkness is the default. That is, if there wasn't anything in the universe, just empty space, it'd be dark, not light. Light only comes about - and banishes darkness - because there's stuff here, glowing and reacting and reflecting.

You can do stuff to interfere with the light - reflect or refract it away, for example - but to get darkness you have to get rid of the light that's bouncing around everywhere.

Answer 3

There are two possible ways to accomplish this:

1) More Practical Method:
Only use light outside the visible spectrum. On the electromagnetic spectrum, the human eye can only see light whose wavelengths are between ~380nm to ~780nm. Technically, infrared electromagnetic radiation still considered to be "light," although your eyes wouldn't be able to detect it.

2) Theoretical Method:
Young's double-slit diffraction experiment demonstrated the wave-like nature of light, along with light's ability to destructively or constructively interfere. If you were to shine two lights completely out-of-phase with each other, they should cancel each other out. So, for this method, use a red laser to illuminate the subject in a large room with black, non-reflective walls. Use another red laser (whose light has the same exact wavelength as the light from the 1st red laser), and move it until it is out-of-phase with the 1st laser.

This is a theoretical experiment only because some light will invariably be reflected off the object and this reflected light won't be cancelled by the out-of-phase light from the 2nd laser.

Answer 4

Light reflects off objects and in a perfect vacuum you would not have any thing to reflect off of.

Answer 5

no.the absence of light IS darkness