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Physics > SP4 - Waves > Flashcards

SP4 - Waves Flashcards

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1
Q

What are transverse waves?

A

Waves that oscillate perpendicular towards the direction energy is transferred.

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2
Q

What are longitudinal waves?

A

Waves that oscillate parallel towards the direction energy is transferred

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3
Q

What is an example of transverse waves?

A

Light waves
Water waves
Earthquakes

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4
Q

What are examples of longitudinal waves?

A

Sound waves

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5
Q

What is the formula for wave speed?

A

Distance
Wave Speed = ——————-
Time

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6
Q

What is the definition of amplitude?

A

The maximum displacement.

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7
Q

What is the definition of frequency?

A

The number of wavelengths per second

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8
Q

What is the unit for frequency?

A

Hertz (Hz)

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9
Q

What is the definition of wave length?

A

The distance between two matching points.

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10
Q

What is the definition of the time period?

A

The time for one complete oscillation.

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11
Q

What is the other formula for wave speed?

A

Wave speed = Frequency x wavelength

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12
Q

What is the unit for wave speed?

A

m/s

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13
Q

What is refraction?

A

Refraction is the change of speed, wavelength and direction when a wave hits the boundary between two different mediums.

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14
Q

Do waves speed up or slow down in mediums with lower density?

A

Speed up

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15
Q

What can happen to a wave when it reaches the boundary between two mediums?

A

Be reflected
Be refracted
Be transmitted
Be absorbed

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16
Q

What does it mean if a wave is reflected?

A

It ‘bounces’ off the boundry

17
Q

What does it mean if the wave is refracted?

A

The wave passes into the new material and changes speed, direction and wavelength.

18
Q

What does it mean if the wave is transmitted?

A

The wave travels through the boundary

19
Q

What does it mean if the wave is absorbed?

A

The wave ‘disappears’ because the energy it is carrying is transferred into the material.

Physics (9 decks)

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