English: An illustration of the Weber-Fechner law.
Circles in the upper row grow in arithmetic progression: each one is larger by 10 units than previous one. They make an impression of growing initially fast and then slower and slower (the difference between 10 and 20 seems larger than between 60 and 70).
Circles in the lower row grow in geometric progression: each one is larger by 40% than previous one. They make an impression of growing by the same amount at each step.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.