electromagneric waves

Question 1

all electromagnetic waves are _______ waves. this means that the lectern and magnetic fields oscillate ______ to the direction or propagation of the electromagnetic wave

Answer 1

transverse, perpendicularly

Question 2

do electromagnetic waves carry electric charges?

Answer 2

no

Question 3

all electromagnetic waves travel with a speed of ______ in a vacuum

Answer 3

3.0 x 10^8 m/s

Question 4

what changes when an electromagnetic wave travels from one medium to another?

Answer 4

it’s wavelength and speed

Question 5

electromagnetic waves undergo _______ and ______

Answer 5

reflections and refractions

Question 6

what is the sequence of electromagnetic waves from increasing to decreasing?

Answer 6

gamma
x - ray
ultraviolet
visible light
infrared
microwaves
radiowaves

Question 7

examples of radio waves

Answer 7

radio and television communication, astronomy and RFID tags

Question 8

examples of microwaves

Answer 8

microwave oven and satellite television

Question 9

examples of infra-red

Answer 9

remote controllers, intruder alarms and thermal imaging

Question 10

examples of visible light

Answer 10

photography, optical fibres in medicine and telecommunications

Question 11

examples of ultraviolet

Answer 11

sunbeds, bank note authentification and disinfecting water

Question 12

examples of x-rays

Answer 12

medical radiology, security screening and industrial defect detection

Question 13

examples of gamma rays

Answer 13

sterilisinh food, detection of cancer and its treatment

Question 14

effects of exposure to ionising radiation
damage b_______ m________, living _____ and t______. it can lead to cell ______, m______ and abnormal cell _____. this can cause _______ such as l_____ and/or d______ to a developing f_______

Answer 14

damage biological molecules, living cells nd tissues. it can lead to cell death, mutations and abnormal cell division. this can cause cancers such as leukemia and/or deformities to a developing foetus.