Why our veins look blue if our blood is red?

We all know that our blood is red and every surgeon will tell you that the veins are also red and blue only appear when you look through your skin. But why? The answer depends on several factors, including how your eyes perceive colors, what is the behavior of light when it comes into contact with your body and specific properties of blood. Light travels with ups and downs. The distance between a peak and a decline is called wavelength. Different colors of light have different wavelengths.

Red light has a longer wavelength, about 700 nm, violet light has a short wavelength, approximately 400 nm, and the remainder of the spectrum is spread between them. We see something as having a particular color when light of that color reaches our eyes - or direct light source or reflected from a surface.

To understand the color of the veins that we see, we need to think about what happens to different wavelengths of light when you touch our skin, how far can penetrate the skin and what happens when you reach the veins. The light that reaches our skin is actually white, which is a combination of all wavelengths. But our explanation we must look at the red and blue lights. Red light has a longer wavelength and that means it is less likely to deviate from the materials and easier travel through them. It travels well through skin and tissue of the body, reaching up to 10 mm below the surface, where many of our veins.

When there comes the red light is absorbed by hemoglobin, a protein that makes blood chervena.Sinyata light has a smaller length and is diffused more easily than red. It does not penetrate as deeply into the skin. When you look at your hand, you will see that from the mixed white light where they veins, reflects less light red and more blue.