blue fireworks Modern Age 

Why its hard to create blue fireworks

Firecrackers were invented serendipitously from the Chinese in 200 B.C. However, it was not until one thousand years after that Chinese alchemists developed fireworks in 800 A.D. These ancient fireworks were mostly bright and noisy concoctions made to frighten evil spirits, not the colourful, controlled explosions we see now. Adding the element strontium into a colour pyrotechnic mix produces a reddish flame; aluminium, blue; barium, green; and sodium for yellow. Too much or too little of these chemicals make substantial changes in the temperature and so the wavelength of colour…

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21st century significant advances Modern Age The Future 

Two of the most significant advances of the 21th century technology

The 21st century has been an era of substantial technological improvements, but overall, we discovered that these improvements all had communications at their core. Using wireless technologies that involved disruptive hardware and software has enabled the human race to contact vast numbers of individuals, having a profound effect on politics, business and culture. These advances have changed our lives entirely to a point where it is tough to imagine going back to what once was. Bluetooth Bluetooth brought the notion of exchanging information in a compact wireless approach to the…

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