the longest wavelength in the electromagnetic spectrum
What is radio waves
100
can also be made using a laser.
This works differently to a light
bulb, and produces "coherent" light
What is Light Waves
100
Too much of this can damage the retina in your eye.
What is Light
100
these people stand behind a sheild when thy x-ray their patients to protect their sevles from cell damage and cancer
What is radiographer
200
what is the shortest wavelength in the Em spectrum
What is Gamma Rays
200
are also used in our weather for Doppler radar
What is micowaves
200
simiply overheating
What is infrared radiation
200
they use satellite pictures to see what's heading our way. Some of the images they use are taken using IR cameras, because they show cloud and rain patterns more clearly.
What is weather forecasters
300
The number of these
crest that past a given
point within one second
are described as the frequency
of the wave, one wave or cycle
per second is call a
What is hertz=Hz
300
Suitable doses of this
cause the body to produce vitamin D,
and this is used by doctors to treat vitamin D
deficiency and some skin disorders.
What is ultra violet
300
Recent research indicates that _ from
mobile phones can affect parts of your brain - after
all, you're holding the transmitter right by your head.
What is micowaves
300
link signals from a array of separate radio antennas to focuses on tiny slices of distant space
What is scientist
400
The distances between crest
are wave lenteght some are
so small they have to be
measured in billons of a meter
which are call
What is nanometers
400
are also used in airport security checks, to see inside
your luggage. They are also used by astronomers
- many objects in the universe emit this, which
we can detect using suitable radio telescopes
What is x-rays
400
Large doses of radio waves are believed to cause cancer, leukaemia and other disorders.
What is radio waves
400
proved the existence of radio waves in the late 1880s.
What is heinrich hertz
500
is energy that travels and
spreads out as it goes
What is radiation
500
You've probably seen TV
programmes in which police
helicopters track criminals at night, using
What is thermal imaging
500
cause sunburn and even skin cancer
What is ultra violet
500
He discovered that firing streams of x-rays through arms and hands created detailed images of the bones inside.