electromagnetic radiation

Question 1

properties:

Answer 1

travel at vacuum at 3*10^8
exhibit polarisation interference diffraction
they carry energy from one place to another and can be absorbed by matter to cause heating and other effects

Question 2

what do these waves consist of

Answer 2

they consist of electric and magnetic

Question 3

3 states of IR

Answer 3

below 500 degrees only emits IR,
at 500 degrees it is red hot and emits IR
at 1500 it is white-hot and radiates IR

Question 4

uses of IR (2)

Answer 4

used as lamps to dry paint

used as sensors/used to treat muscles complaints

Question 5

uses/dangers of UV (2)

Answer 5

UV lamps used in medicine, suntan/vitamins

causes skin cancer/blindness

Question 6

uses of Radio waves (2)

Answer 6

carries sound music etc over long distances

reflects over ionosphere and passes over mountains by diffraction

Question 7

uses of microwaves/dangers (2)

Answer 7

used in radar detection
used for dish tv
used in microwaves

can cause burns to direct exposure

Question 8

uses/dangers of X-ray (2)

Answer 8

used to detect bone damage
used in airport screening

can damage tissues and can be harmful if too much exposure

Question 9

uses of gamma (2)

Answer 9

used to sterilize equipment

used to kill cancer cells