And without light, there would be no sight. When a room full of objects (or a table, a shirt or a sky) looks black, then the objects are not generating nor reflecting light to your eyes. The appearance of black is merely a sign of the absence of light. But there would be no light! The room and everything in it would look black. There would be a brain present that would be capable of deciphering the information sent to it. There would be eyes present that would be capable of detecting light from those objects. There would be objects present that were capable of being seen. If you were to turn off the room lights for a moment and then cover all the windows with black construction paper to prevent any entry of light into the room, then you would notice that nothing in the room would be visible. The whole process, as complex as it is, would not be possible if it were not for the presence of light.
Once light reaches our eyes, signals are sent to our brain, and our brain deciphers the information in order to detect the appearance, location and movement of the objects we are sighting at.
We are able to see because light from an object can move through space and reach our eyes. The visual ability of humans and other animals is the result of the complex interaction of light, eyes and brain. The bottom line is: without light, there would be no sight.
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