Monthly Archives: January 2011

Glass: Liquid or Solid? – Chew Hong En

A widespread urban legend is that stained glass windows in medieval cathedrals are thicker at the bottom because the glass flows slowly downward like a very viscous liquid. Appealing as it is, this is unfortunately a myth: Until the 19th … Continue reading

Posted in Matter | Leave a comment

What is the speed of electricity? – Cheng Luyu

We shall start off with the famous figure: 299792458. Of course people know (at least physicists) what this number represents at a glance. Yes, the speed of light, the supposed limit to the velocity of objects. (I’m quite curious about … Continue reading

Posted in Electricity and Magnetism | Leave a comment

Putt-Putt Boats – Matthew Lee

Description of putt-putt boats: putt-putt-what? “Putt-putt” boats are toy boats that propel themselves through water through the repeated firing of jets of water. In each cycle, water is expelled out of a pipe at the rear of the boat, pushing … Continue reading

Posted in Technology and Engineering | Leave a comment

Special Relativity – Lin Jiahuang

Introduction Personally, I found (and still find) special relativity very, very counter-intuitive and had a hard time learning it. I suppose this is true for quite a handful of people, although there are some who told me that they find … Continue reading

Posted in Relativity and Modern Physics | Leave a comment

“Faster than light”? A Brief Introduction to Lower-than-unity Refractive Index — Lin Sen

Many of us would be familiar with the definition of refractive index: This primarily treats n as a ratio of the speed of light in vacuum to the “apparent” speed of light in some material. It is understood that the … Continue reading

Posted in Technology and Engineering | Leave a comment

How Touch Screens work – Lee Zi Yang

All of us are familiar with electronic devices which utilize touch screens. Even if we don’t own one, we see it every day in places like MRT stations and NTUC check-out counters. We find that some screens, like Apple’s, are … Continue reading

Posted in Technology and Engineering | Leave a comment