REVEALING FACTS ABOUT LIGHT AND VISION
Added on: 3rd Oct 2016
SELENIUM IS AN INSULATOR, MEANING IT DOESN'T
CONDUCT ELECTRICITY. THE CATCH IS THAT THIS
ONLY HOLDS TRUE IN THE DARK. AS SOON AS YOU
SHINE SOME LIGHT ON THE SELENIUM IT TURNS
INTO A CONDUCTOR
HUMANS ACTUALLY HAVE THE ABILITY TO SEE
ULTRAVIOLET LIGHT IT IS JUST FILTERED OUT BY
THE LENS. SOMETIMES PATIENTS WILL BE ABLE
TO SEE INTO THE UV SPECTRUM FOLLOWING
EYE SURGERY
ALTHOUGH BLACK HOLES THEMSELVES ARE
INVISIBLE, THE MATERIAL FALLING INTO THEM IS
OFTEN QUITE BRIGHT. S5 0014+81 IS A BLACK HOLE
THAT IS SO BIG IT WOULD BE JUST AS BRIGHT AS
OUR SUN FROM 6 BILLION TIMES THE DISTANCE!
THANKFULLY IT IS FARTHER THAN THAT!
STOPLIGHT LOOSEJAW IS A DEEP SEA FISH THAT
USES A RED BIOLUMINESCENT LIGHT TO HUNT FOR
FISH. THIS IS QUITE SNEAKY BECAUSE FISH
CANNOT SEA RED LIGHT!
THE FORMER DIVIDING LINE BETWEEN EAST AND
WEST BERLIN CAN STILL BE SEEN FROM SPACE.
WEST BERLIN USES WHITE COLOURED LIGHTS
WHILE EAST BERLIN STILL USES YELLOW
COLOURED LIGHTS
IF YOU PUT A PLANT THAT IS NORMALLY GREEN
UNDER GREEN LIGHT IT WILL MOST LIKELY DIE.
THIS IS BECAUSE GREEN PLANTS REFLECT GREEN
LIGHT (GIVING THEM THE COLOUR) AND ABSORB
THE OTHERS FOR PHOTOSYNTHESIS
THE CENTENNIAL LIGHTBULB IN CALIFORNIA IS THE
LONGEST BURNING LIGHTBULB. IT HAS BEEN ON
SINCE 1901! (WITH A FEW INTERRUPTIONS
DURING POWER FAILURES)
THE SUN IS ACTUALLY WHITE WHEN YOU LOOK AT
IT IN SPACE (NOT RECOMMENDED). IT IS THE
ATMOSPHERE THAT SCATTERS ITS LIGHT
WAVES AND MAKES IT LOOK YELLOW
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