The end of his spritually

The end of his spritually

WHERE DID IT ALL GO WRONG? FOR THE BOTH OF THEM

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i

7月 29
7月 28
46187:

HRmHZ5j.jpg
7月 28

なぜ研究者は小保方さんに厳しいのか: 異端的考察

7月 28
7月 28
poochin:

歯車の立方体
7月 28
7月 28
7月 28

skunkbear:

What makes fireworks colorful?

It all thanks to the luminescence of metals. When certain metals are heated (over a flame or in a hot explosion) their electrons jump up to a higher energy state. When those electrons fall back down, they emit specific frequencies of light - and each chemical has a unique emission spectrum.

You can see that the most prominent bands in the spectra above match the firework colors. The colors often burn brighter with the addition of an electron donor like Chlorine (Cl). 

But the metals alone wouldn’t look like much. They need to be excited. Black powder (mostly nitrates like KNO3) provides oxygen for the rapid reduction of charcoal (C) to create a lot hot expanding gas - the BOOM. That, in turn, provides the energy for luminescence - the AWWWW.

Aluminium has a special role — it emits a bright white light … and makes sparks!

Images: Charles D. Winters, Andrew Lambert Photography / Science Source, iStockphoto, Epic Fireworks, Softyx, Mark Schellhase, Walkerma, Firetwister, Rob Lavinsky, iRocks.com, Søren Wedel Nielsen

(natsuki-observatoryから)

7月 28

maako:

untitled by ©AKI on Flickr.

(mur-yuziから)

7月 28
maako:

untitled by ©AKI on Flickr.