waves

Question 1

what do waves transfer?

Answer 1

energy

Question 2

what are oscillations?

Answer 2

repeated and regular fluctuations above and below the same position

Question 3

what are vibrations in waves?

Answer 3

repeated movements back and forth about a point

Question 4

what type of wave is a sound wave?

Answer 4

longitudinal

Question 5

what type of wave are ripples on water?

Answer 5

transverse waves

Question 6

what do waves NOT transfer?

Answer 6

matter

Question 7

in what type of wave are the vibrations parallel to the direction of wave travel?

Answer 7

longitudinal

Question 8

in what type of wave are the vibrations perpendicular to the direction of wave travel?

Answer 8

transverse

Question 9

what is the equation for time period of a wave?

Answer 9

time period = 1/frequency

Question 10

what is time period of wave measured in?

Answer 10

seconds

Question 11

what is frequency of wave measured in?

Answer 11

Hz

Question 12

what is the equation for wave speed?

Answer 12

wave speed = frequency x wavelength

Question 13

what is wave speed measured in?

Answer 13

m/s

Question 14

what is wavelength measured in?

Answer 14

metres

Question 15

what is frequency?

Answer 15

the number of waves passing a point each second

Question 16

what equipment do you need to measure waves in a ripple tank?

Answer 16

ripple tank, motor, power supply, lamp, wooden rod, metre ruler, white card

Question 17

name 3 examples of a transverse wave

Answer 17

light, water, any electromagnetic wave

Question 18

in a longitudinal wave what direction are the oscillations to the wave energy?

Answer 18

parallel

Question 19

in a transverse wave what direction are the oscillations to the wave energy?

Answer 19

perpendicular

Question 20

what is the time needed for one wave to pass a given point?

Answer 20

period

Question 21

what is region in a longitudinal wave where particles are closest together?

Answer 21

compression

Question 22

what is region in a longitudinal wave where particles are furthest apart?

Answer 22

rarefaction

Question 23

what does an object do to radiation when energy from an electromagnetic wave is taken up?

Answer 23

absorb radiation

Question 24

what does an object do to radiation when a wave can pass through an object?

Answer 24

transmit radiation

Question 26

what is reflection?

Answer 26

the process that takes place when a wave bounces off a surface

Question 27

what is refraction?

Answer 27

the process that takes place when a wave enters a different density medium and changes direction

Question 28

what does refraction change in a wave?

Answer 28

direction and speed

Question 29

which 2 angles are equal in reflection?

Answer 29

angle of incidence and angle of reflection

Question 30

what is the equation linking frequency, wavelength and wave speed?

Answer 30

wave speed = wavelength x frequency

Question 31

what is the speed of electromagnetic radiation?

Answer 31

300 000 000 m/s

Question 32

what type of electromagnetic radiation has the shortest wavelength?

Answer 32

gamma

Question 33

what is the type of electromagnetic radiation with the highest frequency?

Answer 33

gamma

Question 34

list the electromagnetic spectrum from long to short wavelength

Answer 34

radio, microwave, infrared, visible, UV, X-rays, gamma

Question 35

can electromagnetic waves travel through space?

Answer 35

yes

Question 36

can sound waves travel through space?

Answer 36

no

Question 37

does a sound wave travel faster in water or air?

Answer 37

water

Question 38

what is a use of radio waves?

Answer 38

TV and radio transmission

Question 39

what electromagnetic wave is used for satellite communication?

Answer 39

microwave

Question 40

one use of microwaves

Answer 40

cooking food

Question 41

give 2 uses of infrared radiation

Answer 41

electrical heaters, infrared cameras

Question 42

give one use of visible radiation

Answer 42

fibre optic communications

Question 43

which radiation is used in sun tanning?

Answer 43

UV

Question 44

give one use of X-rays

Answer 44

medical imaging

Question 45

give one use of gamma rays

Answer 45

medical treatments

Question 46

why are X-rays good for taking images of bone?

Answer 46

they are absorbed by bone but transmitted through soft tissue

Question 47

why are gamma rays used in medical treatment?

Answer 47

they can kill cancer cells

Question 48

what are the risks of exposure to UV radiation?

Answer 48

skin cancer, premature skin aging

Question 49

what are the risks of exposure to X-rays?

Answer 49

they are ionising so can cause mutations which can result in cancer