electromagnetic waves and radiation Flashcards
1
Q
what are electromagnetic waves
A
these waves contain both electric and magnetic fileds which are 90 degrees to eachother and theyb travel 90 degrees to the direction of travel
2
Q
what are 3 properties of electromagnetic waves
A
they can travel through a vacumn
they travel at the same speed through a vacumn
they transfer energy from the source of the wave to the absorber
3
Q
give some examples of ionising radiation
A
Gamma rays and x-rays
4
Q
what does the word ionising mean
A
this means that it can cause damage to human tissue
5
Q
what are some properties of x-rays
A
they can travel through vacumns
they can damage living tissue
they travel in straight lines
