Geekery

skunkbear:

What makes fireworks colorful?

It’s 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

A little late. Grr. Why didn’t I know this on the 4th? I would have been like, “Boom. Sodium. Boom. Strontium. Cewl.”

thegreatestusernameinthegalaxy:

radiobee:

coffee-and-rainsticks:

Book borrowing is the biggest form of true love it’s like, “Here’s a piece of my soul that I think you would enjoy.” 

image

*slow clap for the harry potter fandom*

covered-with-mist:

http://covered-with-mist.tumblr.com/
insanejellybean:

My TBR jar, because I have so many books I’m always spoilt for choice on what to read and then I end up not reading anything because I just can’t decide, so now everyone I feel like reading I will just pluck one out of the jar :)

I need to do this.

insanejellybean:

My TBR jar, because I have so many books I’m always spoilt for choice on what to read and then I end up not reading anything because I just can’t decide, so now everyone I feel like reading I will just pluck one out of the jar :)

I need to do this.

shoes-booze-and-boys-wth-tattoos:

lorimlee:

Reblog this image to be entered to win.
Click for Full Details! (and a bonus chance to win!)

#GatesOfThreadAndStone

shoes-booze-and-boys-wth-tattoos:

lorimlee:

Reblog this image to be entered to win.

Click for Full Details! (and a bonus chance to win!)

#GatesOfThreadAndStone

philstamper:

shitroughdrafts:

The Declaration of Independence, by Thomas Jefferson. 1776.

Bahaha!

philstamper:

shitroughdrafts:

The Declaration of Independence, by Thomas Jefferson. 1776.

Bahaha!

tastefullyoffensive:

[jaxengrey/ninecircles]

yum.
jtotheizzoe:

Here’s some patriotic prokaryotes to wish you a happy 4th of July full of luminescent liberty!
These light-producing bacteria, known as Photobacterium leiognathi, are ocean-dwelling symbionts, bacteria that live on or within animals, getting protection from their hosts and giving them light-producing tissues in return. 
The anglerfish's glowing bait? That's bioluminescent bacteria. Same with the lanternfish, and certain glowing jellies. 
Thanks for the fireworks, nature!
(via Microbes Rule and Beatrice the Biologist)

jtotheizzoe:

Here’s some patriotic prokaryotes to wish you a happy 4th of July full of luminescent liberty!

These light-producing bacteria, known as Photobacterium leiognathi, are ocean-dwelling symbionts, bacteria that live on or within animals, getting protection from their hosts and giving them light-producing tissues in return. 

The anglerfish's glowing bait? That's bioluminescent bacteria. Same with the lanternfish, and certain glowing jellies. 

Thanks for the fireworks, nature!

(via Microbes Rule and Beatrice the Biologist)

revolutionary-core:

almeida-o-bigodes:

Some of the best #ThingsTimHowardCouldSave memes on twitter.

I hate football, but this is brilliant.