However, they can be programmed with a variety of gradient index (GRIN) structures including diffractive and refractive lenses. The polymers self develop in respnse to light, enabling complex 3D GRIN ...

As with any diffusion theory, there must be a gradient in the distribution of particles, and some mechanism by which the particles are scattered. But in the magnetosphere collisions between ...

This is due to the random movement of the molecules. The direction of diffusion is said to be 'down' or 'with' the concentration gradient. Diffusion stops when the concentration of the substance ...

Oxygen and carbon dioxide, dissolved in water, are exchanged by diffusion in the lungs: The dissolved substances will only continue to diffuse while there is a concentration gradient. Blood flow ...