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Physics > Sb4 > Flashcards

Sb4 Flashcards

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1
Q

Waves on the surface of water

A

Are transverse waves

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2
Q

Transverse waves

A

Particles move up and down and right angles to the direction the wave is moving

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3
Q

Waves transfer

A

Energy

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4
Q

Longitudinal waves

A

Particles move backwards and forwards in the same direction as the wave

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5
Q

What waves do earthquakes produce

A

Seismic waves

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6
Q

What do longtitudinal seismic waves do

A

Push and pull rock material , up and down

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7
Q

What do transverse seismic waves do

A

Move rock side to side

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8
Q

Wave frequency

A

Number of waves passing a point each second
Measured in Hertz

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9
Q

What does wave frequency determine?

A

In sound, it determines the pitch
In light it determines the colour

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10
Q

Period in waves

A

The length of time it takes one wave to pass a given point

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11
Q

Wavelength definition

A

The distance from a point on one wave to the same point on the next wave, measured in metres

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12
Q

Amplitude

A

Maximum distance of a point on the wave away from its rest position

The greater the amplitude of a sound wave, , the louder the sound

Measured in metres

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13
Q

Wave speed equation

A

Wave speed = distance / time

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14
Q

Wave speed equation including frequency and wavelength

A

Wave speed m/s= frequency Hz x wavelength m

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15
Q

What does a speed of the wave depend on

A

The medium it is travelling through

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16
Q

Light wave speeds in different mediums

A

Travels at 300000000 m/s in a vacuum
Slower in glass and water
When it slows down the wavelength reduces

17
Q

Measuring speeds of waves on the water

A

Measure the time it takes for the wave to travel between two fixed points like buoys. Then use the speed time distance equation

18
Q

Refraction

A

Change in direction of waves when they enter a different medium

19
Q

Where does the wave refract when it goes from air to water/glass

A

Towards the normal

20
Q

Where does the wave refract when it goes from water/glass to air

A

Away from the normal

Physics (4 decks)

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