REVEALING FACTS ABOUT LIGHT AND VISION

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