Electromagnetic Spectrum

Question 1

properties of EM waves

Answer 1

transverse, travel @ speed of light in a vacuum

Question 2

order of EM spectrum by frequency

Answer 2

radio, microwave, IR, visible light, UV, X-rays, gamma

opposite way by wavelength

Question 3

how to distinguish between different em waves

Answer 3

they have specific wavelengths and frequencies

Question 4

uses of UV

Answer 4

sun beds
security pens
fluorescent lights

Question 5

dangers of UV

Answer 5

type of ionising radiation
causes heating effect
sunburn, destroy cells
mutate DNA- could cause cancer

Question 6

uses of x rays

Answer 6

scanning for broken bones
treating some cancers
CAT scans and fluoroscopies

Question 7

dangers of x rays

Answer 7

type of ionising radiation
can kill cells
can mutate DNA
radiation poisoning

Question 8

uses of gamma

Answer 8

sterilising medical equipment
radiotherapy- treating cancer
CT scanning

Question 9

dangers of gamma

Answer 9

damage and kill cells

mutate DNA

Question 10

uses of IR

Answer 10

greenhouse effect, keeps temp of earth

Question 11

uses of microwaves

Answer 11

heating food

Question 12

uses of radiowaves

Answer 12

radio, TV