Question

why is the absence of light darkness​

Answer 1

$\huge\bold\red{ANSWER:-}$

Darkness is a term used to describe a human perception. Darkness does not exist as a thing or as something described by science. It's just an experience perceived by humans.

Light is a thing. The amount of light in a volume, emitted by an object, reflecting off a surface can be measured.

You really can't have a total absence of light since all matter emits blackbody radiation, although at temperatures we can survive at that emitted light is below the range of human vision.

In fact, a room could be extremely "bright" with infrared and ultrvmviolet light and still be perceived as dark by a human.

========================

Plz mark as brainlist.....

Answer 2

Answer:

First of all, Black isn't a colour.

Either you are seeing a colour or blackness. Black is the absence of all colours as White is presence of all the colours.

Generally when we see an object which is green, red, blue etc. What we see is the light that object is reflecting. So a Green object reflects only the green part of light and absorbs all other colours, that the light falling on the object consist of.

So a true black object will absorb all of the light falling on it. We call such an object ‘Blackbody’.

But in reality nothing is completely black. The black objects we come across daily also reflects some part of light

An object which is Green (or any other colour) also looks green if it is emitting light which falls in the Green spectrum of light.

Now coming to the point, If there is no light, or to be precise…. if there is no part of visible spectrum of light, that is either falling on the object or is emitted by the object then an object can't be seen by our naked eyes. As it is the absence of all colours( because visible light will be of a colour at least) what we see is blackness.

So, in the night a completely dark room appears black because there is no light (visible spectrum of light) so our eyes can't perceive any colour and that absence of colour results in ‘Blackness’. And we can't see blackness unless we compare it with something we can see.

hope it helps .....