to the image on the next slide.
GO OUTSIDE!
at the bottom of the box.
Tape the prism in place.
and in 10 to 15 minutes or when the temperatures stop changing.
Also, record the temperature in the box well outside the rainbow.
with a permanent black marker.
of the rainbow.
or cooler than red
the temperature on the paper totally outside the rainbow
was WARMER than either the cool blue or the warmer red.
The thermometers detected
a form of light that people cannot see!
that there is LIGHT
you cannot see!
Spectrum!
Herschel's discovery of infrared,
another form of invisible light
was discovered called ULTRAVIOLET.
These invisible forms of light
are part of the
Yet you live in a sea of radio waves.
A radio antenna picks up these invisible waves and
the radio turns them into SOUND.
Radio waves are INVISIBLE --
but you use microwaves to heat food. Microwaves are invisible
Most warm objects, living or not, emit infrared.
That includes you!
Half the energy radiated by the Sun is in the infrared.
Remote controls use infrared waves
to communicate with other devices.
Infrared waves are INVISIBLE
Here is what a child, a gecko and a scorpion look like in the infrared.
The cold blooded creatures do not radiate much heat.
Humans are warm blooded. WE MAKE HEAT FROM FOOD.
YOU are not light sources, but you are an INFRARED SOURCE!
of the electromagnetic spectrum
you can detect with your eyes.
of the rainbow!
of visible light!
However, many insects ARE able to see UV!
UV light causes both sunburn and tanning.
than visible light. In fact, x-rays can pass through most objects, including your body.
They are opaque to x-rays and can create a shadow.
An x-ray detector creates
an image of these shadows.
It is produced by nuclear decay, lightning, solar flares, matter-antimatter annihilation, and the interaction between cosmic rays and matter, as well as astronomical sources.
Gamma radiation is used to study the universe, scan containers, sterilize food and equipment, diagnose medical conditions and treat cancers.
Gamma ray are invisible - -
X-rays and Gamma Rays