Brain-Rain.

Science in action. And also, goofing off.

Join me in my quest to become brilliant.

Posts tagged physics

Aug 29
xysciences:

A nuclear reactor starting up.
The blue glow is Charenkov radiation. 
[Click for more interesting science facts and gifs]

xysciences:

A nuclear reactor starting up.

The blue glow is Charenkov radiation. 

[Click for more interesting science facts and gifs]

(via spacequakes)


Aug 11

skunkbear:

The evil geniuses at NASA Ames Research Center are trying to create super intelligent soccer balls with a top-secret vaporized serum! … er … wait, no. They’re just studying the aerodynamics of the official World Cup ball - the “Brazuca.”

Geoff Brumfiel has the full story here.

Football fluid dynamics is a touchy subject on the international stage. Goalies hated the 2010 World Cup’s ball (the too-smooth “Jabulani”) because it was said to swerve and twist in the air. Joe Palca covered that story four years ago.

NPR: covering ball aerodynamics since 1971.

(via freshphotons)


Aug 4

Aug 3
trigonometry-is-my-bitch:

Geometrical visualisation of a 4D shape from a 3D Perspective - The Tesseract
Hypercubes are shapes with n dimensions where n is greater than the 3 dimensions of a normal cube. The Tesseract, or the 4-cube, is a 4 dimensional hypercube.
where n is the dimensional number, in any hypercube:

vertices = 2^n
edges = n(2^n-1 )
faces = 2^n-3(n-1)n

trigonometry-is-my-bitch:

Geometrical visualisation of a 4D shape from a 3D Perspective - The Tesseract

Hypercubes are shapes with n dimensions where n is greater than the 3 dimensions of a normal cube. The Tesseract, or the 4-cube, is a 4 dimensional hypercube.

where n is the dimensional number, in any hypercube:

vertices = 2^n

edges = n(2^n-1 )

faces = 2^n-3(n-1)n

(via visualizingmath)


Jul 26
spaceplasma:

Microwave Induced Plasma

This coaxial microwave plasma source (MPS) generates plasma without using a magnetic field. It works like an inverse luminescent tube excited by microwaves. The coaxial microwave plasma generator consists of a copper rod (antenna) as inner conductor surrounded by quartz tube filled with argon gas, the plasma is the outer conductor. The inside of the tube is at atmospheric pressure whereas the outside is at low pressure. The plasma formed around the quartz tube acts as an outer conductor in such a way that a spatially extended surface wave is created, just in an equivalent (‘inverse’) situation to that found in the Surfatron source (where the plasma is inside the tube instead of outside).
The microwave with a frequency of 2.45 GHz generated by two magnetrons is fed into the copper rods at both ends. On the outside of the tube, in the low pressure, the microwave fields ignite the plasma. The plasma represents a conductive medium so by increasing microwave power the plasma grows from both ends along the tube, and a homogeneous plasma is formed. The high power microwave breakdown at atmospheric pressure leads to the formation of filamentary structures. These striations or string-like structures, also known as birkeland currents, are seen in many plasmas, like the plasma ball, the aurora,lightning,electric arcs, solar flares, and even supernova remnants.

spaceplasma:

Microwave Induced Plasma

This coaxial microwave plasma source (MPS) generates plasma without using a magnetic field. It works like an inverse luminescent tube excited by microwaves. The coaxial microwave plasma generator consists of a copper rod (antenna) as inner conductor surrounded by quartz tube filled with argon gas, the plasma is the outer conductor. The inside of the tube is at atmospheric pressure whereas the outside is at low pressure. The plasma formed around the quartz tube acts as an outer conductor in such a way that a spatially extended surface wave is created, just in an equivalent (‘inverse’) situation to that found in the Surfatron source (where the plasma is inside the tube instead of outside).

The microwave with a frequency of 2.45 GHz generated by two magnetrons is fed into the copper rods at both ends. On the outside of the tube, in the low pressure, the microwave fields ignite the plasma. The plasma represents a conductive medium so by increasing microwave power the plasma grows from both ends along the tube, and a homogeneous plasma is formed. The high power microwave breakdown at atmospheric pressure leads to the formation of filamentary structures. These striations or string-like structures, also known as birkeland currents, are seen in many plasmas, like the plasma ball, the aurora,lightning,electric arcs, solar flares, and even supernova remnants.

(via proofmathisbeautiful)


Jul 24

tfwnojutsu:

thatruskieyakattack:

completed-nihilism:

Vantablack

British researchers have created the ‘new black’ of the science world - and it is being dubbed super black.

The material absorbs all but 0.035 per cent of light, a new world record, and is so dark the human eye struggles to discern its shape and dimension, giving the appearance of a black hole.

Named Vantablack, or super black, it also conducts heat seven and half times more effectively than copper, and is ten times stronger than steel.

It is created by Surrey NanoSystems using carbon nanotubes, which are 10,000 thinner than human hair and so miniscule that light cannot get in but can pass into the gaps in between.

Article

i don’t like this

(via aromaladyrose)


Jul 13
cenchempics:

FLUORESCENCE
Colloidal quantum dots incorporated in ionic salts (bottom, NaCl matrix) are more brightly photoluminescent than they are in solution (top, aqueous). Changing quantum dot size and/or composition yields different emission colors, allowing device makers to tune the optical properties of the material.
Credit: Chem. Mater. 2014, DOI: 10.1021/cm5009043 

cenchempics:

FLUORESCENCE

Colloidal quantum dots incorporated in ionic salts (bottom, NaCl matrix) are more brightly photoluminescent than they are in solution (top, aqueous). Changing quantum dot size and/or composition yields different emission colors, allowing device makers to tune the optical properties of the material.

Credit: Chem. Mater. 2014, DOI: 10.1021/cm5009043 

(via freshphotons)


Jul 8

Jul 4
scienceisbeauty:

Interesting reading in The New York Times about Gravity: Still Exerting a Hold on Science.

scienceisbeauty:

Interesting reading in The New York Times about Gravity: Still Exerting a Hold on Science.

(via spacequakes)


Jun 20
alexturnerplease:

witchyroses:

omjephillips:

witchyroses:

WHAT IS HAPPENING HERE?!??!??!

It’s quicksand. Quicksand is much thicker than water, which is why things sink so slowly. By that same logic, one can walk on its surface if you go fast enough and with little enough pressure, like skipping a stone on water.

THAT IS FANTASTIC

THIS IS NOT HOW I THOUGHT QUICKSAND WORKED.

alexturnerplease:

witchyroses:

omjephillips:

witchyroses:

WHAT IS HAPPENING HERE?!??!??!

It’s quicksand. Quicksand is much thicker than water, which is why things sink so slowly. By that same logic, one can walk on its surface if you go fast enough and with little enough pressure, like skipping a stone on water.

THAT IS FANTASTIC

THIS IS NOT HOW I THOUGHT QUICKSAND WORKED.

(via oswinious)


Page 1 of 18