It is one of the most important laws of nature that we know: The famous second law of thermodynamics says that the world gets more and more disordered when random chance is at play. Or, to put it more ...

Why does time seem to flow one way when most physical laws are time-symmetric? This video examines entropy, information, and ...

Can the flap of a butterfly's wings in Brazil set off a tornado in Texas? This intriguing hypothetical scenario, commonly called "the butterfly effect," has come to embody the popular conception of a ...

How it works When laser light passes through a cavity filled with atoms, part of it can do useful work. In this example the work is charging a quantum battery (top). The rest of the light turns into ...

What is entropy meaning? Why are some reactions spontaneous/feasible? Why is the entropy of a perfect crystal zero? Is diffusion an example of entropy? All this and more covered in this comprehensive ...

THERE is, I fear, a difficulty in drafting Prof. Bryan's definition so as to be clear as well as accurate. This arises when the definition is first given with reference to the entropy of the working ...