Unit 1.1 Features Of Waves

Question 1

Two types of waves

Answer 1

Longitudinal and transverse wave

Question 2

Transverse wave

Answer 2

Has vibrations that are perpendicular to the direction of wave travel

Question 3

Longitudinal wave

Answer 3

Has vibrations that go along the direction of wave travel

Question 4

Transverse wave eg

Answer 4

Visible Light

Question 5

Longitudinal wave eg

Answer 5

Sound

Question 6

At rest

Answer 6

The resting point of wave

Question 7

wavelength / cycle

Answer 7

Distance between 2 consecutive, similar points

Question 8

What is the amplitude of the wave

Answer 8

Maximum displacement of a wave from the waves rest position

Question 9

Frequency

Answer 9

The number of wavelengths / cycles passing a point every second

Question 10

Measuring Unit of frequency

Answer 10

Hertz (Hz)

Question 11

Wavespeed, wavelength, frequency triangle

Answer 11

V

λ. f

Question 12

Speed , distance, time triangle

Answer 12

D

S. T

Question 13

1MHz

Answer 13

1 000 000 Hz

Question 14

Reflection

Answer 14

Angle of incidents = angle of reflection

Question 15

Normal

Answer 15

Line perpendicular to barrier

Question 16

Light slows down / velocity decreases

Answer 16

bends towards the normal

Question 17

Light speeds up / velocity increases

Answer 17

Bends away from the normal

Question 18

refraction

Answer 18

Light slows down in the denser medium and bends towards the normal, then in the less dense air it bends away from the normal

Question 19

Light passes along the normal

Answer 19

Does not refract

Question 20

What to remember when drawing waves that REFLECT

Answer 20

θi = θr

λi = λr

Question 21

What to remember when drawing waves that REFRACT

Answer 21

λi > λr (water slows down in shallows)

Question 22

Incident ray is ____ to the refracted/imergent ray

Answer 22

Parallel

Question 23

1kHz

Answer 23

1000Hz

Question 24

1mHz

Answer 24

0.001Hz

Question 25

Frequency in shallow water waves and frequency in deep waves

Answer 25

The frequency is the same

Question 26

Uses of radio waves

Answer 26

Telecommunication

Question 27

Uses of microwaves

Answer 27

Satellite communication

Question 28

Uses of infra red waves

Answer 28

Thermal imaging

Question 29

Uses of visible light waves

Answer 29

Endoscopy

Question 30

Uses of ultra Violet waves

Answer 30

Check for counterfeit notes / substances may fluoresce by absorbing UV

Question 31

Uses of x rays

Answer 31

Airport security

Question 32

Uses of gamma rays

Answer 32

Kill tumors

Question 33

Name all ionising waves

Answer 33

UV X-ray Gamma

Question 34

Ionising waves, causes

Answer 34

High doses can kill living cells, lower doses can damage cells and cause cancer

Question 35

Ionising waves properties

Answer 35

Smaller wavelength High frequency High amount of energy

Question 36

Non ionising waves properties

Answer 36

Bigger wavelength Lower frequency Lower amount of energy

Question 37

Name all non ionising waves

Answer 37

Radio Microwaves Infrared Visible light

Question 38

Alpha waves stop on…

Answer 38

Paper

Question 39

Beta waves stop on…

Answer 39

Aluminium

Question 40

Gamma waves stop on…

Answer 40

Lead

Question 41

Most ionising to least ionising

Answer 41

Alpha beta gamma

Question 42

Most penetrating to least penetrating

Answer 42

Gamma beta alpha

Question 43

Radio wavelength

Answer 43

(10 to the power of 3 )metres

Question 44

Microwaves wavelength

Answer 44

(10 to the power of -2) metres

Question 45

Infra red wavelength

Answer 45

(10 to the power of -4) metres

Question 46

Visible light wavelength

Answer 46

(10 to the power of -6) metres

Question 47

UV wavelength

Answer 47

(10 to the power of -8) metres

Question 48

X-ray wavelength

Answer 48

(10 to the power of -11) metres

Question 49

Gamma rays wavelength

Answer 49

(10 to the power of -15) metres

Question 50

Similarities geo synchronous and geo stationary

Answer 50

Both orbit earth once during the 24h it takes earth to complete one rotation

Question 51

Geostationary

Answer 51

Appears at the same point above earth at all times

Question 52

Geosynchronous

Answer 52

Appears at the same point above earth at specific times of the day once every 24h

Question 53

Data rates: optical fibre satellite

Answer 53

optical fibre : higher satellite : lower

Question 54

Mobility: optical fibre satellite

Answer 54

optical fibre : not mobile satellite : mobile

Question 55

Reliability : optical fibre satellite

Answer 55

optical fibre :higher satellite: lower

Question 56

Delay: optical fibre satellite

Answer 56

optical fibre : none satellite : some

Question 57

Interference: optical fibre satellite

Answer 57

optical fibre : no emi satellite : high emi

Question 58

Cost: optical fibre satellite

Answer 58

optical fibre : lower satellite : higher

Question 59

Installation: optical fibre satellite

Answer 59

optical fibre : urban/plains satellite : remote/ mountains

Question 60

Amount of repeaters required: optical fibre Electrical cable

Answer 60

optical fibre : some Electrical cable : high amount

Question 61

Speed of infrared

Answer 61

200 000 km/s

Question 62

Speed of microwave

Answer 62

300 000 km/s

Question 63

Electrical cables have ________ ________ due to _________ __________ than optical fibres, therefore they are ___________ to ______

Answer 63

More EMI More repeaters/boosters Easier Bug

Question 64

Properties of electromagnetic waves

Answer 64

Transverse waves Can travel through vacuum All travel at 3x (10 to the power of 8) m/s

Question 65

What to remember when doing equations

Answer 65

Check units Check whether is has to be multiplied