6.6.2.3 properties of electromagnetic waves 2 Flashcards
How are radio waves produced
By oscillations on electrical circuits
What happens when radio waves are absorbed
They may create an alternating current with the same frequency as the radio wave itself
What can radio waves induce?
Radio waves themselves can induce oscillations on an electrical circuit
What results in electromagnetic waves being generated or absorbed over a wide frequency range
Changes in atoms and the nuclei of atoms
What do gamma rays originate from
Changes on the nucleus of an atom
What electromagnetic waves have hazardous effects on human body tissue
Ultraviolet waves, X-rays and gamma rays
What do the effect of electromagnetic waves depend on
Type of radiation and size of the doze
What is a measure of the risk of harm resulting from an exposure of the body to the radiation.
Radiation does
What is radiation measured in?
Sieverts
How many millisieverts is a sievert
1000 millisieverts (mSv) = 1 sievert (Sv)
How can ultraviolet waves effect the human body
They can cause skin to age prematurely and increase the risk of skin cancer.
How can X-rays and gamma rays effect the human body
They are ionising radiation that can cause the mutation of genes and cancer.
