Royal Society Archive

Why does hot water freeze more quickly than cold water?

You might have tried to freeze water in your fridge. But have you ever noticed that hot water freezes faster than cold water? If not, try it yourself. This phenomenon where hot water freezes faster than cold water is called Mpemba effect. The Mpemba effect has been a well known physicist since the time of Aristotle who noticed it more than 2,000 years ago. There were many ideas since then to have been put forward to explain the same. One idea is that warm containers make better thermal contact with a refrigerator and so conducts heat more efficiently, which leads

HARISH CHANDRA and His Love For Mathematics

The word mathematics is like a dangerous monster for some people. Many of the students who consider mathematics as their enemy would have thought that the subject mathematics should never have existed. But in this world of billions of population, there are many who not only love mathematics but take it up as their career. Harish Chandra was one among such people in the olden times who was a well-known mathematician. Not only did he like the subject mathematics, but also made significant contributions to the world of mathematics which is undoubtedly praiseworthy. Harish Chandra was born on 11th of