Finding The Electromagnetic Spectrum
Published on Nov 22, 2015
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PRESENTATION OUTLINE
I WONDER...
WHERE CAN I FIND THE ELECTROMAGNETIC SPECTRUM?
I KNOW!
I CAN JUST LOOK AROUND ME!
RADIO WAVES HAVE THE LONGEST WAVELENGTH.
THIS ALSO MEANS THAT THEY ARE THE WEAKEST. MY PHONE EMITS THEM!
MY MICROWAVE EMITS MICROWAVES.
IT HEATS UP MY FOOD WHEN IT GETS COLD.
INFRARED RAYS COME OUT OF MY TV REMOTE CONTROL.
EVEN OUR SKIN EMITS THESE! THAT'S HOW THERMAL IMAGES WORK.
VISIBLE LIGHT COMES OUT OF LIGHTBULBS!
THIS IS THE ONLY PART OF THE SPECTRUM WE CAN SEE.
ULTRAVIOLET COMES OUT OF THE SUN.
IF YOU GET TOO MUCH OF IT, YOU MIGHT GET SKIN CANCER! THANKFULLY, THE OZONE LAYER BLOCKS SOME OF IT.
X-RAYS ARE USED BY DOCTORS TO SEE YOUR BONES.
AIRPORT SECURITY USES THESE RAYS TO LOOK AT YOUR BAGS.
Photo by Karen Roe
GAMMA RAYS HAVE THE HIGHEST ENERGY AND SHORTEST WAVELENGTH.
THEY ARE DANGEROUS TO LIVING THINGS. HOWEVER, THEY CAN TARGET AND KILL CANCER CELLS!
Photo by pfala
SO...IT LOOKS LIKE THE ELECTROMAGNETIC SPECTRUM IS EVERYWHERE!
IMAGES ARE FROM THE HAIKUDECK IMAGE DATABASE
