Visualizzazione post con etichetta History. Mostra tutti i post
Visualizzazione post con etichetta History. Mostra tutti i post

sabato 6 novembre 2010

In the beginning it was dark and cold

Whirlpool Galaxy and its companion NGC 5195

The history of light coincides with the beginning of life, since without light, there would be no life.
In cosmogony, the nebular hypothesis is the most widely accepted model explaining the formation and evolution of the Solar System. The nebular hypothesis was first proposed in 1734 by Emanuel Swedenborg an developed in 1755 by the German philosopher Immanuel Kant.
About 4 billion years ago, soon after the Sun was formed, the Earth and other planets were formed from violent explosions and spinoffs from the process that created the Sun. Gradually oceans appeared and sunlight and water gave birth to life (3 Billion BC), eventually, intelligent life (2 Billion BC).

giovedì 21 ottobre 2010

History of lighting



In both historic and economic terms, human civilisation revolves around artificial light. Since its earliest incarnation as firelight to its most recent as electric light, artificial light has been at the core of human civilisation. It has freed us from the temporal and spatial constraints of daylight by allowing us to function equally well night and day, indoors and outdoors.

We can trace the history of lighting since the first primitive lamp, invented around 70,000 BC, passing through Greeks terra cotta lamps around the 7th century BC, arriving at the 18th century, when the central burner was invented, a major improvement in lamp design. 
In 1879, whit the invention of the light bulb by Thomas Alva Edison, the history of electric lighting begun.

The extract below provides a brief history of lighting as portrayed in the 1888 publication, Municipal Lighting and is direct insight into how it all began:
The history of the electric light is interesting. Notwithstanding the proverbial tendency of mankind to believe that the "olden time" showed many points of superiority to the present, the casual retrospective view will call to mind a list of modern improvements which are now considered indispensable adjuncts of civilization, but which have been introduced within the memory of thousands who are now living.