Diffusion Of Blue Dye In An Agar Gel
by Martyn F. Chillmaid/science Photo Library
Title
Diffusion Of Blue Dye In An Agar Gel
Artist
Martyn F. Chillmaid/science Photo Library
Medium
Photograph - Photograph
Description
Diffusion. Methylene blue dye diffusing through agar gel in a test tube. A sample of the dye was placed in a thin layer half way down the tube. The dye has started to dissolve into the agar and permeate throughout the tube. Diffusion occurs because all molecules have motion due their heat energy. Each molecule moves in a random direction, meaning that there will be a net movement of dye molecules from areas of high concentration (the central band) into areas of low concentration (the agar). The rate of diffusion depends upon the nature of the substances involved, and their temperature. Photographed one week after the experiment was begun.
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May 10th, 2022
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