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Physics Flashcards

1
Q

Wave properties

A
  • oscillations
  • vibrations
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2
Q

What do sound waves do

A

vibrate air particles back and forth

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3
Q

What is a longitudinal wave

A

they are parallel waves to the direction of the wave travel

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4
Q

What is a transverse wave

A

vibrations are at right angles to the direction of the wave

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5
Q

Mechanical waves

A

cause oscillations of particles in a solid, liquid or gas and must have a medium to travel through.

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6
Q

What do electromagnetic waves cause …

A

cause oscillations in a electrical or magnetic field

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7
Q

What are all the parts of a wave

A

Rest position
frequency
amplitude
trough
peak wavelength
time period

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8
Q

rest position

A

the undisturbed position of particles or fields when they are not vibrating

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9
Q

Peak

A

the highest point of the wave

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10
Q

trough

A

lowest point of the wave

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11
Q

amplitude

A

the maximum displacement of a point of a wave from its rest position

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11
Q

Wavelength

A

distance covered by the full cycle of the wave

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12
Q

frequency

A

the number of waves passing through a point.

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13
Q

equation for time period

A

time period = 1/frequency

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14
Q

equation for speed

A

speed = distance / time

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15
Q

examples of longitudinal waves

A

ultrasound waves
sound waves

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16
Q

what do longitudinal waves show areas of …

A

compression and rarefaction

17
Q

examples of transverse waves

A

ripples of water
vibrations of a guitar string
Mexican wave

18
Q

how are transverse waves shown

A

moving a rope up and down

19
Q

What kind of waves are electromagnetic waves

A

transverse

20
Q

what do all electromagnetic waves have

A
  • transfer energy as radiation
  • can travel through a vacuum
  • can travel at the same speed in a vacuum then it can air
21
Q

electromagnetic spectrum

A

Radio waves
microwaves
infrared
visible light
UV
X rays
Gamma rays

22
Q

Radio waves

A

Communication

23
Q

Microwaves

A

cooking or satellite communications

24
Q

UV

A

can not see it but can cause damage

25
Q

What are types of ionising radiation

A

Gamma, UV, X rays
they can remove electrons from molecules producing electrically charged ions

26
Q

Risks of UV

A
  • Skin cancer
  • burns
  • age prematurely
27
Q

Risks of Gamma and X rays

A

Mutation in genes, which can lead to cancer

28
Q

What can waves do
( reflection )

A

Reflect at the boundary between two different materials

29
Q

What is reflection from a smooth flat surface called

A

sepcular reflection

30
Q

What happens if the surface is rough
( diffuse reflection )

A

instead of forming an image the reflected light is scattered off into all directions

31
Q

What is rarefaction

A

It is the change in the direction of the wave

32
Q

What is the Leslie cube

A

It is a cube that has 5 different surfaces on each face.
Matte black
shiny black
Matte white
Shiny white
Shiny Sliver

33
Q

scalar

A

only have magnitude or size

34
Q

examples of scalars

A

temp
mass
energy
density
distance

35
Q

vector

A

have both magnitude and direction

36
Q

contact force

A

Forces that act between two objects that physically touching each other

37
Q

examples of contact forces

A

tension
air resistance
friction

38
Q

non contact

A

forces that act between two objects that are not physically touching each other

39
Q

examples of non contact forces

A

magnetic field
electrostatic force
gravitational force

40
Q

balanced force

A

when forces are acting on a object and are the same size but going in different directions this is called balance

Flashcards (5 decks)

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