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gcse physics - paper 2 > P12 - Wave Properties > Flashcards

P12 - Wave Properties Flashcards

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1
Q

What are the 2 types of waves?

A

transverse & longitudinal

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2
Q

Define wave.

A

way of trnsfrrng energy wtht trnsfrrng matter

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3
Q

In all waves, what way in what direction is energy transferred?

A

left -> right

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4
Q

In a transverse wave, what direction do the particles travel?

A

up & down - perpendicular to direction of energy trnsfrrd

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5
Q

Give an example of a transverse wave.

A

(surface water) wave

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6
Q

Define wavelength in a transverse wave.

A

distance from peak -> peak

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7
Q

What is an oscillation?

A

wave moving up & down

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8
Q

Define the amplitude of a transverse wave.

A

max dsplcmnt of wave’s point -> rest postion.

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9
Q

In a longitudinal wave, what direction do the particles travel?

A

left -> right - parallel to direction energy trnsfrrd

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10
Q

What is it called where a part of a longitudinal wave squashes together?

A

compression

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11
Q

What is it called where a part of a longitudinal wave is spread out?

A

rarefraction

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12
Q

Define wavelength in a longitudinal wave.

A

distance from compression -> compression

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13
Q

What is frequency?

A

number of waves that pass point each second

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14
Q

What is the equation for speed of sound?

A

distance btwn mcphns/ time on cmptr

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15
Q

Give an example of a longitudinal wave.

A

sound

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16
Q

What type of wave requires a medium to travel through?

A

longitudinal

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17
Q

In both tranverse or longitudinal wave, what travels, the wave or the matter?

A

wave

18
Q

What is the period of a wave?

A

time(s) for 1 wave to pass point

19
Q

When waves travel from one medium to another, what changes? What doesn’t change?

A

speed & wavelength changes, not frequency

20
Q

Define reflection.

A

waves bounce back

21
Q

Define refraction.

A

waves change speed & direction as they cross boundary

22
Q

In a wave front diagram, when a wave crosses an ordinary boundary what happens?

A

wave slows down at same speed

23
Q

In a wave front diagram, when a wave crossses a boundary at an angle what happens?

A

1 end of wave front changes speed before other end -> wave changes direction

24
Q

Do waves travel faster or slower in deep water?

A

faster

25
Q

Do waves travel faster or slower in shallow water?

A

slower

26
Q

What is the rule on filters & colours?

A

filters transmit their own colours

27
Q

What is the rule of objects & colours?

A

objects reflect their own colours

28
Q

What colours make cyan?

A

blue & green

29
Q

What colours make magenta?

A

blue & red

30
Q

What colours make yellow?

A

green & red

31
Q

How do you recognise a real image?

A

projected onto screen

32
Q

How do you recognise a virtual image?

A

comes behind lens

33
Q

What type of lenses are always virtual?

A

concave

34
Q

How do you recognise a magnified image?

A

image > object

35
Q

How do you recognise a diminished image?

A

image < object

36
Q

How do you recognise an inverted image?

A

upside down compared to object

37
Q

What is the symbol for a concave lens?

A

upside down arrowheads

38
Q

How do you represent a virtual image?

A

dotted lines

39
Q

What happens to ultrasound waves when they meet a boundary between 2 different materials?

A

some reflected, some absorbed & some transmttd

40
Q

How do x rays produce an image of bones?

A
  • x rays absorbed by bones
  • x rays go through other tissues
  • so neg. image of where x rays blocked = recdd on computer
41
Q

What is refraction caused by?

A

change in speed when density changes

gcse physics - paper 2 (6 decks)

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