P11 Waves Flashcards

1
Q

What is frequency

A

The number of oscillations in one second

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2
Q

What is frequency measured in

A

Hertz (Hz)

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3
Q

What is the crest

A

the top of the wave

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4
Q

What is the wavelength

A

The distance between waves (between identical points)

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5
Q

What is the trough

A

The bottom of the wave

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6
Q

What is the amplitude

A

The distance from the equilibrium line to the trough or crest

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7
Q

What do waves do

A

Transfer energy and information without a net movement of material

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8
Q

What are oscillations

A

Vibrations

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9
Q

What is a period

A

The time it takes for one oscillation or wave to pass

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10
Q

What are periods measured in

A

Seconds (s)

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11
Q

What equation links time period and frequncy

A

T=1/f

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12
Q

Equation linking wavespeed, frequency and wavelength

A

V=Fλ

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13
Q

What is wavespeed

A

How fast the wave is moving

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14
Q

What is the measure for wavespeed

A

M/s

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15
Q

What is wavelength measured in

A

Metres (m)

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16
Q

What is a transverse wave

A

The oscillation of the material is in a perpendicular direction

17
Q

Examples of transverse wave

A

-Ripples on the surface of the water
-vibrations in a guitar string
-electromagnetic waves

18
Q

What is a longitudinal wave

A

The oscillations of the material is in a parallel direction compared to the wave directions

19
Q

Examples of longitudinal waves

A

-Sound (ultrasound,infrasound)
-p-wave (primary seismic waves)

20
Q

What is the speed of light

21
Q

What do transverse waves travel at

A

Speed of light

22
Q

What do longitudinal waves travel at

A

Speed of sound

23
Q

What is the speed of sound

24
Q

What is refraction

A

When a wave changes direction as it crosses a boundary

25
Why does refraction happen
The wave changes speed
26
What happens to energy and frequency during refraction
They don't change
27
What is reflection
When the wave is reflected at the boundary between two different materials