SCIENCE
The History of Photography
Photography is the technique by which pictures or images are recorded on a light sensitive material by its reaction to light or similar radiation. The term ‘photography’...
The History of Telescopes
The word telescope has a Greek origin and is derived from teleskopos, meaning 'far-seeing'. When you mention a telescope in every day life, you usually...
The History of Television
The television has become such an integral part of homes in the modern world that it is hard to imagine life without television. The boob tube, as television is also referred...
How Concrete Works
Concrete is a manmade building material that looks like stone. Combining cement with aggregate and sufficient water makes concrete. Water allows it to set and bind...
How Lasers Work
A laser is not a word in itself but is actually an acronym for Light Amplification by the Stimulated Emission of Radiation. Once you understand what the different letters
mean...
How Motors Work
To put it simply, motors use electromagnetic fields to generate motion. Electric motors function on the principle of magnetism— like poles repel, and opposite poles...
How Radios Work
There is a controversy surrounding the invention of radio. It is believed that in 1895, an Italian scientist Guglielmo Marconi successfully sent and received...
How Televisions Work
When TV was invented, there were two types of television systems: Mechanical and Electronic. The mechanical module was phased out years ago and all modern...
What Is Short Wave?
To understand shortwave, we must look at the radio spectrum, also called the electromagnetic spectrum. This spectrum is the range of all possible frequencies of...
What Is Static Cling?
Static cling is a property of substances that make them cling to each other because of opposite electrical charges. When the conditions are dry and two different kinds...