Why the shadow of any object is only black in colour?

Answer 1

In a well darkened room, the room is dark since there is practically no light inside the room.

If we a lit a candle and cover the flame of light so that it emits light through a small hole and hence a beam of light is emitted from the candle. If we place an opaque object like a coin, then the shadow caused by the coin will be black. It is because no light is falling in the shadow region.
And no light is coming from the shadow region.

But the shadow caused in a room where light is coming from all directions is not black but is having less intensity of light. In the shadow region some of the light is not falling due the prevention of light by the object causing shadow. If the object is removed more light will fall in that region.
Therefore, shadow is a region which is having less intensity of light than the surrounding region. Particularly it is not black. It is less bright and that is all.

Observe the shadows caused in your room and you can find that it is not black but the shadows have less intensity of light. If the object causing the shadow is removed that place will receive more light .

Answer 2

Light makes objects visible and it is also responsible for the colour of different objects. Without the presence of light every object looks black. Now, shadows are formed when light falls on an object and being unable to penetrate through it, the light rays doesn't reach the surface next to the object where that object's shadow is formed. And thus without the presence of light the shadow looks black in colour.

Answer 3

Because a solid object blocks light, black is just the absence of light. In the real world shadows appear grey because light is reflected from other surfaces onto the shadowed area, lighting it up.

If the object casting the shadow is not solid, the shadow will be coloured by the object. Eg. Red balloons have red shadows.

Answer 4

we see the colours when the light reflects from the object and enters into our eye and make the image in the retina. there are three primary colours red blue and green. the amount of light falling on these sensers generate different colour feeling. when all the three colour sensors are stimulated equally then we see the colour as white. when these sensores are not stimulated with any of the lights no colour will be visible which appears to be black. shadow is formed when there is no light and hence the colour of the shadow is black

Answer 5

Black is a colour! you don't get black light though (by this I mean light which is black, not UV light).

Anyway, I've seen shadows that are not black, for instance on those projectors which use 3 different coloured bulbs to make an image give shadows in different colours, depending on which bulb is obscured. But the principles above still hold... except for black not being a colour, which it blatently is.

Answer 6

The shadow can be any color. You are just used to shadows being cast by a single source of light so the space is dark. In theater and photography, where we use multiple light sources with different colors, the shadow from one source on one side will have the color of the other source. If most of the lights on one side of the stage are light blue and most on the other side are pink, then the shadows from the blue side will have a pink tone and those from the pink side will be blue. Combined with makeup and costumes, this gives a greater liveliness than just having white light at different brightnesses and can, if the scenery is spattered with various spots of color allow completely changing the mood of a set from warm to cool.
Of course, if used wrongly it can produce some really stupid results, with purple shadows of the nose.

Answer 7

Black is not a colour and so also white white is formed by the combination of all colours and black due to the lack of light .Have we forgotten the colour wheel experiment you had in school where you were asked to spin a multi coloured wheel and it appeared white, like so black is the absence of any colour or light.

Answer 8

Because the shadow contains diffused light that is too dim for the eye to detect. On the moon where there there is no atmosphere, there is no diffusion, the absence of light in a shadow there is total.

Answer 9

black is n ot a color but it rather is t he absence of any color,so when light is blocked by an object(light is mixture of colors)the absence of light makes shadow and this shadow is black

Answer 10

its a region of no light or reduced light. without light blackness is the 'color' thats there. although black is not a color its the lack of light.