A light-emitting-diode (LED) is a semiconductor diode that emits light when an electric current is applied in the forward direction of the device, as in the simple LED circuit. The effect is a form of electroluminescence where incoherent and narrow-spectrum light is emitted from the p-n junction […]
Bill Gates has always been fond of his cars, but new patent applications suggest Microsoft’s founding geek is becoming even more of a gearhead. Gates is listed among 10 inventors on a series of filings seeking patents on various aspects of electromagnetic engines — including a method of retrofitting […]
An airbag is a vehicle safety device. It is an occupant restraint consisting of a flexible envelope designed to inflate rapidly in an automobile collision, to prevent vehicle occupants from striking hard interior objects such as steering wheels. An American inventor, Dr. David S. Breed, invented and developed a […]
The Compact Disc, or CD, is an optical disc used to store digital data, originally developed for storing digital audio. While working at Pacific Northwest National Laboratory, James Russell invented the underlying principles of the compact disc,[408] later presenting and selling the rights to companies such as […]
Snowboarding is a sport that involves descending a slope that is either partially or fully covered with snow on a snowboard attached to a rider’s feet using a special boot set into a mounted binding. The development of snowboarding was inspired by skateboarding, surfing and […]
The principle of relativity in order to attain the greatest possible clearness , let us return to our example of the railway carriage supposed to be traveling uniformly.We call its motion a uniform translation ( “uniform” because it is of constant velocity and direction, […]
Everyone has heard it said of somebody or other that he (or she) was born to be a genius. Can such an assertion ever be correct? A simple ‘yes or no’ answer has to be negative, because sophisticated inborn capabilities simply cannot exist. Outside mythology, nobody begins […]
The electromagnetic spectrum is the full range of electromagnetic radiation and includes radio waves, heat and light rays, X rays, and gamma rays. Electromagnetic radiation is a form of energy that travels at the velocity of light. 186.000 mi/sec (300.000km/sec). As it travels, its energy […]
Cosmic rays Electrons and the nuclei of atoms—largely hydrogen—that impinge upon Earth from all directions of space with nearly the speed of light. These nuclei with relativistic speeds are often referred to as primary cosmic rays, to distinguish them from the cascade of […]
The branch of science that describes the effects of the interactions between charges due to their motion and spin. These may appear in various forms, including electric currents and permanent magnets. The interactions are described in terms of the magnetic field, although the field hypothesis cannot be […]
