P6 waves

Question 1

The maximum displacement of a point on a wave away from its undisturbed position is the…

Answer 1

Amplitude

Question 2

The distance from a point on one wave to the equivalent point on the next wave is the …

Answer 2

wavelength

Question 3

The number of waves passing a point each second is the…

Answer 3

Frequency

Question 4

Name an example of a longitudinal wave

Answer 4

Sound

Question 5

Name an example of a transverse wave

Answer 5

light, water, any electromagnetic

Question 6

Oscillations are along the same direction as the direction of travel is a _________ wave

Answer 6

longitudinal

Question 7

Oscillations are at right angles to the direction of travel in a ____________ wave

Answer 7

transverse

Question 8

The time needed for one wave to pass a given point is the…

Answer 8

period

Question 9

The region in a longitudinal wave where particles are closest together is a …

Answer 9

compression

Question 10

The region in a longitudinal wave where particles are furthest apart is a…

Answer 10

rarefaction

Question 11

An object is said to _________ radiation when energy from an EM wave is taken up by the object

Answer 11

absorb

Question 12

An object is said to _________ radiation when a wave can pass through the object

Answer 12

transmit

Question 13

The process taking place when a wave bounces off of a surface

Answer 13

reflection

Question 14

The process taking place when a wave enters a different density medium and changes direction

Answer 14

refracion

Question 15

Refraction changes both the _________ and ___________ of a wave

Answer 15

direction and speed

Question 16

Which two angles are equal in reflection

Answer 16

angle of incidence and angle of reflection

Question 17

Write the equation linking frequency, wavelength and wave speed

Answer 17

v = fλ

Question 18

What is the unit of frequency?

Answer 18

Hertz (Hz)

Question 19

What is the unit of wavelength?

Answer 19

metres (m)

Question 20

What is the unit of wave speed?

Answer 20

metres per second (m/s)

Question 21

What is the speed of electromagnet radiation?

Answer 21

300 000 000 m/s

Question 22

What is the EM radiation with the shortest wavelength?

Answer 22

gamma

Question 23

What is the EM radiation with the longest wavelength?

Answer 23

Radio

Question 24

What is the EM radiation with the highest frequency?

Answer 24

Gamma

Question 25

What is the EM radiation with the lowest frequency?

Answer 25

Radio

Question 26

List the EM spectrum from long to short wavelength.

Answer 26

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

Question 27

Can EM waves travel through space?

Answer 27

yes

Question 28

Can sound waves travel through space?

Answer 28

no

Question 29

Does a sound wave travel faster in water or air?

Answer 29

water

Question 30

Name a use of radio waves

Answer 30

TV and radio transmission

Question 31

What EM wave is used for satellite communication?

Answer 31

microwave

Question 32

Give one use of microwaves

Answer 32

cooking food

Question 33

Give two uses of IR radiation

Answer 33

electrical heaters, infrared cameras

Question 34

Give a use of visible radiation

Answer 34

Fibre optic communications

Question 35

Which radiation is used in sun tanning?

Answer 35

UV

Question 36

Give one use of X-rays.

Answer 36

Medical imaging

Question 37

Give one use of gamma rays

Answer 37

Medical treatments

Question 38

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

Answer 38

absorbed by bone but transmitted through soft tissue

Question 39

Why are gamma rays used in medical treatment?

Answer 39

Can kill cancer cells

Question 40

What are the risks of exposure to UV radiation?

Answer 40

Premature skin aging, increased risk of skin cancer

Question 41

What are the risks of exposure of X-rays?

Answer 41

X-rays are ionising so can cause mutations which may result in cancer

Question 42

What are the risks of exposure to gamma rays?

Answer 42

Gamma rays are ionising so can cause mutations which may result in cancer