Topic 4 & 5 Waves, light and the EM Spectrum Flashcards Preview

Edexcel GCSE Combined Science Physics > Topic 4 & 5 Waves, light and the EM Spectrum > Flashcards

Flashcards in Topic 4 & 5 Waves, light and the EM Spectrum Deck (76):
1

1 Name three different types of wave.

any three from: light, sound, waves on water, seismic waves

2

2 What property of a wave does the wavelength describe?

the distance from one wave to the same place on the next wave

3

3 What are the units for wavelength?

metres

4

4 What property of a wave does the frequency describe?

the number of waves per second

5

5 What are the units for frequency?

hertz

6

6 What is transferred by a wave?

energy

7

7 What does amplitude mean?

the height of a wave, more correctly, the maximum displacement of a particle from its rest position

8

8 In which direction do the particles in a sound wave move compared to the direction the wave is travelling?

backwards and forwards in the same direction as the wave

9

9 What word is used to describe waves like sound waves?

longitudinal

10

10 What word is used to describe waves like the waves on water?

transverse

11

11 Name a type of transverse wave.

waves on water, some seismic waves, light waves

12

12 Name a type of longitudinal wave.

sound, some seismic waves

13

13 What is the difference between longitudinal and transverse waves?

the direction the particles move compared to the direction the wave is travelling

14

14 What word describes the number of waves per second?

frequency

15

15 What word describes the time taken for one wave to pass?

period

16

16 What word describes the distance between a point on one wave and the same point on the next wave?

wavelength

17

17 What are the units for frequency?

hertz

18

18 Name two things that waves can transfer.

energy and information

19

19 Name one thing that waves do not transfer.

matter

20

20 What is the equation that links wave speed, frequency and wavelength?

wave speed=frequency x wavelength

21

21 What two things do you need to measure to find the speed of a wave?

either the time to cover a certain distance, or the wavelength and the frequency

22

22 Describe the path of light when you watch TV.

TV to eye

23

23 Describe the path of light when you sit underneath a lamp and read a book.

lamp to book to eye

24

24 What is the word that describes light bouncing off a material?

reflection

25

25 What does refraction mean?

changing the direction of a wave

26

26 When does refraction happen to light waves?

when light goes into or out of a material

27

27 Name three materials that light can travel through.

any three transparent materials, such as air, glass, water, Perspex

28

28 Why is it difficult to see the exact positions of objects on the bottom of a swimming pool?

light is refracted as it leaves the water

29

29 What does the frequency of a wave describe?

number of waves per second

30

30 What are the units for frequency?

hertz

31

31 What does the wavelength of a wave describe?

distance from one point on a wave to the same point on next wave

32

32 What are the standard units for wavelength?

metres

33

33 What does refraction mean?

waves changing direction when they go from one material to another

34

34 What is a vacuum?

empty space

35

35 What materials can light pass through?

vacuum, air, glass, water

36

36 Are light waves transverse or longitudinal?

transverse

37

37 What do all waves transfer?

energy

38

38 A nanometre is one millionth of a millimetre. Why are nanometres sometimes used for giving the wavelengths of light waves?

the wavelength is very short

39

39 What are the colours of the rainbow?

red, orange, yellow, green, blue, indigo, violet

40

40 What piece of apparatus can you use to split up light to form a spectrum?

prism

41

41 Which colour in visible light has the longest wavelength?

red

42

42 What does EM stand for?

electromagnetic

43

43 Are EM waves transverse or longitudinal?

transverse

44

44 Which part of our bodies detects visible light?

eyes

45

45 Which part of our bodies detects infrared?

skin

46

46 H Name two parts of the EM spectrum that can travel through the atmosphere.

All can to some extent, but the expected answer at this stage is infrared and visible light, as we can detect both of these from the Sun .

47

47 Which electromagnetic waves have the highest frequency?

gamma rays

48

48 Which electromagnetic waves have the longest wavelengths?

radio waves

49

49 Which electromagnetic waves have lower frequencies than visible light?

infrared, microwaves, radio waves

50

50 Which electromagnetic waves have higher frequencies than visible light?

ultraviolet, X-rays, gamma rays

51

51 Which colour of visible light has the shortest wavelength?

violet

52

52 Which colour of visible light has the highest frequency?

violet

53

53 Which colour of visible light has the lowest frequency?

red

54

54 Which part or parts of the electromagnetic spectrum is used for cooking?

infrared, microwaves, radio waves

55

55 Which part or parts of the electromagnetic spectrum is used for sending TV programmes?

radio waves, microwaves

56

56 Which part of the electromagnetic spectrum is used in TV remote controls?

infrared

57

57 Which part of the electromagnetic spectrum is detected by our eyes?

visible

58

58 Which part of the electromagnetic spectrum is emitted by toasters and grills?

infrared

59

59 Which part of the electromagnetic spectrum is used for mobile phone communications?

microwaves

60

60 Which part of the electromagnetic spectrum are light bulbs designed to emit?

visible light

61

61 Which part of the electromagnetic spectrum is used to cook food from the inside?

microwaves

62

62 Which part of the electromagnetic spectrum is used to treat cancer?

gamma rays

63

63 Which part of the electromagnetic spectrum can be used to look inside bodies?

X-rays

64

64 H How are radio waves produced?

by oscillations in electrical circuits

65

65 H How are radio waves detected?

They produce oscillations in circuits attached to an aerial.

66

66 H Why do radio waves sometimes have a longer range than microwaves?

refraction in the atmosphere

67

67 Which transfers the most energy: red, green or violet light?

violet

68

68 Which part of the electromagnetic spectrum is used to sterilise surgical instruments?

gamma rays

69

69 Which part of the electromagnetic spectrum is used to examine luggage in airports?

X-rays

70

70 Which part of the electromagnetic spectrum is used to sterilise water?

ultraviolet

71

71 Which part of the electromagnetic spectrum do fluorescent materials emit?

visible light

72

72 Which part of the electromagnetic spectrum is produced inside many low energy light bulbs?

ultraviolet

73

73 Which part of the electromagnetic spectrum is emitted by radioactive materials?

gamma rays

74

74 Which part of the electromagnetic spectrum is used to make images of bones?

X-rays

75

75 Which part of the electromagnetic spectrum can cause skin cancer?

ultraviolet

76

76 Which part of the electromagnetic spectrum can cook things by heating water inside them?

microwaves