waves

Question 1

what do waves transfer

Answer 1

energy

Question 2

definition of transverse waves

Answer 2

disturbance is at 90 degrees to the direction of travel

Question 3

definition of longitudinal wave

Answer 3

disturbance is parallel to direction of wave travel

Question 4

example of longitudinal wave

Answer 4

sound waves

Question 5

example of transverse wave

Answer 5

all EM waves, water waves

Question 6

what is wave speed?

Answer 6

distance travelled per second
(v, ms-1)

Question 7

what is frequency

Answer 7

no. of waves produced per second by a source of waves
(f, Hz)

Question 8

what is wave length

Answer 8

distance between two identical points on consecutive waves
(lamda, m)

Question 9

what is amplitude

Answer 9

measure of the size of the disturbance of the medium caused by the wave ( height of crest, or depth of trough measured from MIDLINE)

Question 10

what is the period of a wave

Answer 10

time for one full wave to pass a point
( T, s)

Question 11

long wavelengths ( low frequency) = ? diffraction

Answer 11

large diffraction

Question 12

short wavelength (high frequency) =? diffraction

Answer 12

small diffraction

Question 14

The EM spectrum order

Answer 14

Gamma (shortest wavelength)
X-ray
Ultraviolet
Visible light
Infrared
Microwaves
Radio (longest wavelength)

Question 15

Radio wave - source, detector, and uses

Answer 15

source- electronic circuits
detector- aerial
uses- radio, TV

Question 16

microwaves- source, detector, and uses

Answer 16

source- electronic circuits
detector- aerial
uses- satellites, heating water and food

Question 17

infrared- source, detector, and uses

Answer 17

source- the sun, warm objects
detector- heat sensitive paper
uses- security lighting

Question 18

visible light - source, detector, and uses

Answer 18

source- the sun
detector- photographic film, eye
uses- seeing photography, laser surgery

Question 19

UV - source, detector, and uses

Answer 19

source- sun
detector- film, PHOTODIODES
uses- tanning, killing bacteria, sterilising equipment

Question 20

X-rays - source, detector, and uses

Answer 20

source- very fast ELECTRONS hitting a metal target
detector- photographic film
uses- imaging breaks/ defects in bones

Question 21

gamma rays - source, detector, and uses

Answer 21

source- radioactive nuclei decaying
detector- PHOTOGRAPHIC film
uses- medical tracers

Question 22

what speed do EM waves travel at

Answer 22

speed of light

Question 23

what type of waves are EM waves

Answer 23

transverse

Question 24

what is refraction

Answer 24

when waves travel from one medium to another

Question 25

what happens to waves when they undergo refraction

Answer 25

change of wave speed, change in wavelength and change of direction

Question 26

as the speed of the wave decreases the wavelength?

Answer 26

also decreases

Question 27

where is the angle of incidence

Answer 27

in between the ray and the normal before entering the medium

Question 28

where is the angle of refraction

Answer 28

in between the normal and ray after entering the medium