HUMAN SKIN COLOR

The human skin color is a combination of this two melanin concentrations. This 2 types of pigments creates our skin color.

Why can we see colors?

Light Source

To be able to see an object, it is necessary to have a light source which emits light. This light rays are reflected from an object like a face and enter our eye. Only if an object is reflecting or emitting light, we can see the object. If you see different objects with different colors, it means that the object is absorbing some parts of the white light and reflect only a part of the original sun light.  

Light Receiver - Our Eye

Light is everywhere in space and surrounds us continuously. We need light rays to observe our world. Without a light source it is not possible to see anything. Everything would be black around us. We can percept an object by receiving light through the lens of our eye. The light rays enters the inner of our eyes and hits some special cells. This special light sensitive cells are the rods & cones and forms the retina.  

Why we see colors?

Many people would say, that they know exactly what a color is. But is this really true? Let´s have a look about the creation of colors and how we percept them. In general we all would say that color is light. This is only half true, because light is a electro magnetic ray, which is emitted by different light sources. Light is created always by matter, which has a specific temperature. As higher the temperature, as more light frequencies an object is emitting. 

Almost all light sources emits more or less a full spectrum of different visible light rays which represent the white light. Of course the sunlight has a much bigger spectrum then a candle light, but this comes later in detail. Now we see a general light source like our sun. The bright white light of our sun is a mixture of many different wavelength. A light ray can have different frequencies with different wavelength. This is like a sound wave in the air. There are long waves and shorter waves of light. In our eye we have special nerve cells which are able to distinguish different wavelength. This light sensitive cells are the CONE´s. 

White light is not white at all

A white light has already all colors (ray frequencies) inside. This can be shown by separating a white light beam into single parts. This can be done by a prism or if you look into nature, by a nice rainbow you see in the sky. This are the building blocks of color vision. But only because you see colors, it does not mean that there are really colors in the outside world. Outside of our body, there are only different energy waves with different frequencies, which has no color by themselves. 


What is creating all colors?

The simple fact is this - our brain is the creator of the colors. All energy waves which we percept from the outside world are getting transformed into a color information by our brain. Without an observer with a brain, colors do not exist. Only a conscious mind, can distinguish colors. 

Learn about CONE cells

If you want to learn more about the vision of color.

READ MORE

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