The Mystery of the Missing Money – One Rupee

Puzzle Two women were selling marbles in the market place — one at three for a Rupee and…

Understanding Poincaré Conjecture

Introduction & Statement of Poincaré Conjecture In 1904, the french Mathematician Henri Poincaré posed an epoch-making question in…

Cosmic Radiations – East West Effect -Discovery of Positron- Cosmic Ray Showers

Cosmic Rays or Cosmic Radiation Soon after 1900 it was shown by scientists that the air in an…

Rayleigh- Jean’s Law

Lord Rayleigh on classical limes made an attempt to explain the energy distribution in black body radiation, which…

Wein’s Laws

Various workers tried to explain the problem of energy distribution in black body radiation and finally the problem…

Largest Prime Numbers

What is a Prime Number? An integer, say $p$ , [ $\ne {0}$ &…

Albert Einstein and His introduction to the Concept of Relativity

Albert Einstein This name need not be explained. Albert Einstein is considered to be one of the best…

Derivative of x squared is 2x or x ? Where is the fallacy?

We all know that the derivative of $x^2$ is 2x. But what if someone proves it to be just x?
Consider a sequence of functions as follows:- $f_1 (x) = \sqrt {1+\sqrt {x} }$ \$ f_2…