P13 Electromagnetic Waves

Question 1

carrier waves

Answer 1

waves used to carry any type of signal

Question 2

charge-coupled device (CCD)

Answer 2

an electronic device that creates an electronic signal from an optical image formed on the CCD’s array of pixels

Question 3

contrast medium

Answer 3

an X-ray absorbing substance used to fill a body organ so the organ can be seen on a radiograph

Question 4

electromagnetic spectrum

Answer 4

the continuous spectrum of electromagnetic waves

Question 5

ionisation

Answer 5

any process in which atoms become charged

Question 6

microwaves

Answer 6

electromagnetic waves between infrared radiation and radio waves in the electromagnetic spectrum

Question 7

optical fibre

Answer 7

thin glass fibre used to transmit light signals

Question 8

radiation dose

Answer 8

amount of ionising radiation a person receives

Question 9

radio waves

Answer 9

electromagnetic waves of wavelengths greater than 0.10m

Question 10

ultraviolet radiation (UV)

Answer 10

electromagnetic waves between visible light and X-rays in the electromagnetic spectrum

Question 11

wave speed

Answer 11

the distance travelled per second by a wave crest or trough

Question 12

white light

Answer 12

light that includes all the colours of the spectrum