P1 - topic 2 - The Dangers of Electromagnetic Radiation Flashcards
as the frequency of EM radiation changes, what else changes?
it’s interaction with matter
What are examples of the way EM radiation interacts with matter?
absorbs
reflects
transmit
Can the EM waves at each end of the spectrum tend to be able to do what’s
pas through material
EM waves nearer to the middles are absorbed/transmitted?
absorbed
The effects of EM waves on humans depends on what?
the frequency of the EM wave
Why does the frequency of a wave determine the effect that it has on humans?
the frequency determines the energy of the waves
The properties of EM waves depends on what?
their frequency
Why are some waves more harmful than others?
because they have a high frequency, so the more energy the radiation had
microwaves have similar frequency to the vibrations of many what?
molecules
How do microwaves result in heating?
increase the vibrations
Why do microwaves harm humans?
they heat human body cells
what waves do mobile phones use?
microwaves
Why have mobile phones and the increasing use of them caused concern?
the handset is often held close to the brain, so there has been links with brain tumours
The vibrate range of frequencies can make what happen?
the surface of molecules of any substance vibrate
Do infrared waves have a heating effect?
yes
