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Physics > Waves > Flashcards

Waves Flashcards

1
Q

How do waves happen ?

A

Caused by something vibrating or oscillating

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2
Q

What are waves ?

A

A movement of energy from one place to another

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3
Q

What are the two types of waves ?

A

Longitudinal & transverse

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4
Q

What are transverse waves ?

A

Where each particle oscillates perpendicular to the direction of propagation of the waves . (Like a slinky)

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5
Q

What do transverse waves consist of ?

A

Peaks and troughs

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6
Q

What a longitudinal waves ?

A

Waves that each particle oscillates parallel to the direction of the propagation of the wave

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7
Q

What are compressions ?

A

Region of the wave where particles are close together

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8
Q

What are rarefactions?

A

Regions where particles are relatively far apart

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9
Q

Examples of longitudinal waves ?

A

Sound, ultrasound and systemic P-waves

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10
Q

What does amplitude mean ?

A

The maximum displacement from the equilibrium position

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11
Q

What is displacement?

A

The distance of a point on a wave from its equilibrium position

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12
Q

What does wavelength refer to ?

A

The minimum distance between two points and a wave that are in phase.

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13
Q

What is frequency ?

A

Number of complete oscillations per second

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14
Q

What does period refer to ?

A

Time taken for one whole oscillation

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15
Q

What does wavespeed refer to ?

A

The distance a wave travels in one second

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16
Q

What is frequency measured in ?

A

Hertz (Hz)

17
Q

What equation is used to find period (T) ?

A

T= 1/F

18
Q

What symbol represents wavespeed?

A

V (velocity)

19
Q

What equation is used to find speed ?

A

Speed = distance / time

20
Q

What is superposition?

A

The resultant amplitude

21
Q

What is a stationary wave ?

A

Formed by superposition when 2 waves travelling in opposite direction meet

22
Q

What is a node ?

A

Points on a stationary wave where the amplitude is the minimum

23
Q

What is an antinode?

A

Point on a station with were the amplitude is a maximum

24
Q

How are stationary waves formed on a string ?

A

The superposition went to with travelling in the opposite direction meet

25
Q

What’s destructive interference?

A

2 waves occupy the same space and interact with each other, 180 degrees out of phase

26
Q

What is constructive interference?

A

2 wait occupy the same space and interact with each other ,phase difference of 0 degrees

27
Q

What is the phase difference at nodes ?

A

180 degrees (destructive interference £

28
Q

What is the phase difference at antinodes ?

A

0 degrees ( constructive interference)

29
Q

What is diffraction?

A

When waves reach a gap they pass through it and spread out

Physics (2 decks)

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