News tagged with fireworks
Fireworks are a class of explosive pyrotechnic devices used for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display. A fireworks event (also called a fireworks show or pyrotechnics) is a display of the effects produced by firework devices. Fireworks competitions are also regularly held at a number of places. Fireworks (devices) take many forms to produce the four primary effects: noise, light, smoke, and floating materials (confetti for example). They may be designed to burn with flames and sparks of many colors, typically red, orange, yellow, green, blue, purple, and silver. Displays are common throughout the world and are the focal point of many cultural and religious celebrations.
The earliest documentation of fireworks dates back to 7th century China, where they were invented. The fireworks were used to accompany many festivities. It is a part of the culture of China and had its origin there, eventually it spread to other cultures and societies. Important events and festivities such as the Spring Festival (Chinese New Year) and the Mid-Autumn Festival were and still are times when fireworks are guaranteed sights. China is the largest manufacturer and exporter of fireworks in the world.
Fireworks are generally classified as to where they perform, either as a ground or aerial firework. In the latter case they may provide their own propulsion (skyrocket) or be shot into the air by a mortar (aerial shell). The most common feature of fireworks is a paper or pasteboard tube or casing filled with the combustible material, often pyrotechnic stars. A number of these tubes or cases are often combined so as to make, when kindled, a great variety of sparkling shapes, often variously colored. The skyrocket is a common form of firework, although the first skyrockets were used in war. Such rocket technology has also been used for the delivery of mail by rocket and is used as propulsion for most model rockets. The aerial shell is the backbone of today's commercial aerial display. A smaller version for consumer use is known as the festival ball in the United States. Ground fireworks, although less popular than aerial ones, create a stunning exhibition. These types of fireworks can produce various shapes, ranging from simple rotating circles, stars and 3D globes.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
A new type of firework caused severe eye injuries and blindness in children and adults at last year's bonfire night celebrations, warn doctors in a letter to this week's BMJ.
Health Oct 02, 2012 | not rated yet | 1
(Medical Xpress) -- Just in time for the July Fourth holiday, Virginia Tech College of Engineering researchers have published a study that shines a new spotlight on the dangers of fireworks on the human eye, ...
Health Jul 04, 2012 | 1 / 5 (1) | 0
Fireworks are meant to be enjoyed, but you'll appreciate them much more this Independence Day and all summer knowing your family is safe. Fireworks can be fun to watch, but they can also be very dangerous. Dont ever ...
Health Jul 02, 2012 | not rated yet | 0
The Fourth of July is a day of picnics, parades and celebrations, and nothing quite says Independence Day like fireworks. However, doctors at Vanderbilt University Medical Center urge caution with consumer ...
Health Jul 02, 2012 | not rated yet | 0
(Medical Xpress) -- Summer can be really fun, but also quite noisy. And with 4th of July coming up, the fireworks can reach 150 decibels. While the pyrotechnic displays are exhilarating to watch, hearing experts hope you'll ...
Health Jun 26, 2012 | not rated yet | 0
The Fourth of July is a time for celebration across the country and fireworks are a crowd favorite each year. While fireworks can be fun to watch, they also can be very dangerous.
Health Jul 01, 2011 | not rated yet | 1 |