Find out what is up in Instytut Fotonowy and  check our collection of scientific curiosities.

26 June 2009 Beautiful proof of Pythagorean theorem

Zbigniew Karkuszewski, June 26-th...

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22 February 2009 Size matters for the Schrödinger’s cat

You may have heard that quantum world is weird or even worse, that quantum mechanics (QM) is so unnatural that no one really understands it. Well, judge for yourself. If you read this note through and still think it's all magic, punish yourself by buying from our competition. The most abused example of inner workings of QM is the Schrödinger's cat "paradox". The idea is to magnify a small...

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5 January 2009 How to kill a cancer cell?

Two years have passed since the seminal workof Canadian researchers on a drug that destroys cancer cells while leaving healthy tissue undamaged. The substance is called DCA (dichloroacetic acid) and is used in the form of sodium salt NaDCA dissolved in water. The drug is today in second stage of clinical trials (human patients) conducted in University of Alberta, Canada. The official DCA...

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22 October 2008 A-class headphone amplifier

Have you ever wondered if it is possible to build a simple amplifier of high sound fidelity? Have you thought if audiophiles are right claiming that quality must cost a fortune? If so, I suggest to build a simple A-class, single-ended amplifier and hear it with your own ears. It has a simple output stage and highest sound quality, free from a crossover and other harmonic distortions. MOSFET...

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26 May 2008 Consciousness for engineers

"Consciousness is a state that defies definition, but which may involve thoughts, sensations, perceptions, moods, emotions, dreams, and an awareness of self, although not necessarily all of these. Consciousness is a point of view, an I, or what Thomas Nagel called the existence of "something that it is like" to be something." - Wikipedia Have you ever tried to grasp the notion of...

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14 March 2008 A shortcut to E=mc2

Have you ever considered how to actually derive the famous E=mc2  formula? Does it require knowledge of Special Relativity or even worse: an understanding of the theory?. Well, no! The only skill needed is some high-school physics and a bit of curiosity. There is a box of mass M and horizontal length L in the picture below.The center of mass of the box in rest hangs somewhere above point...

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