- #1
hokhani
- 483
- 8
I don't know the reason of materials' color? Why one matter is blue and another is red? Which mechanism is responsible for their color; Absorption, Luminescence, Scattering, Reflection?
Thanks a lot.CompuChip said:Short answer: It depends :)
Longer answer: In most cases, I would say that absorption / reflection is the reason that we see a certain color: if you shine white light (i.e. a mixture of all frequencies) onto a material, it will absorb some of the colors and reflect the rest. However, there are special cases in which the color is caused by another mechanism. For example, LEDs work by virtue of luminescence and the sky is blue because of scattering and not because it absorbs all other colors.
Color is perceived when light interacts with matter. When white light from the sun or a light source hits a material, some of the light is absorbed while the rest is reflected. The reflected light is what we see as color.
The color of a material is determined by its chemical composition and the way it interacts with light. Different materials absorb and reflect different wavelengths of light, resulting in different colors.
Yes, the color of a material can change due to various factors such as exposure to light, heat, or chemical reactions. For example, leaves change color in the fall due to changes in temperature and light exposure.
The structure of a material can affect its color by influencing how light is absorbed and reflected. For example, materials with a smooth surface reflect light differently than those with a rough surface, resulting in different colors.
No, some colors in materials are not visible to the human eye. Ultraviolet and infrared light, for example, are outside of the visible light spectrum and cannot be seen by the human eye, but they can still affect the perceived color of a material.