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Year 9 - Physics > Term 2 Test - Waves > Flashcards

Term 2 Test - Waves Flashcards

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1
Q

What are the 3 properties of a wave?

A

Amplitude
Wavelength
Frequency

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2
Q

What do all waves have in common?

A
  • All waves are caused by vibrations
  • Always transferring energy without matter
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3
Q

What is amplitude?

A
  • The maximum distance a point is being moved by a wave measured from it’s equilibrium position.
  • In simper terms, this is the wave’s height. This shows how much energy a wave has. If a sound wave has a higher amplitude, it is louder. If a light wave has a higher amplitude, it is brighter.
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4
Q

What is wavelength?

A
  • The distance between identical points in adjacent waves
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5
Q

What is compression in a longitudinal wave?

A
  • Compression is that part of longitudinal wave in which the medium of particles are closer
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6
Q

What is rarefaction in a longitudinal wave?

A
  • Rarefaction is that part of longitudinal wave in which the medium of particles apart
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7
Q

What is frequency?

A
  • The number of waves passing a point in a unit amount of time
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8
Q

What is wave speed?

A
  • The distance a wave has travelled in a unit amount of time
  • The speed at which a wave moves through a medium
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9
Q

What is refraction?

A
  • The change in direction of a wave passing a boundary.
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10
Q

What causes light to bend towards the normal?

A
  • The light wave is being transmitted through a medium of higher density, which causes it to slow down and refract towards the normal.
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11
Q

What causes light to bend towards the normal?

A
  • The light wave is being transmitted through a medium of lower density, which causes it to speed up and refract away from the normal.
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12
Q

What are the four things a wave does when crossing boundaries?

A
  • Transmission
  • Refraction
  • Absorption
  • Reflection
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13
Q

What is the law of reflection?

A
  • Angle of incidence is equal to the angle of reflection
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14
Q

What is a longitudinal wave?

A
  • Vibrations that are parallel to the direction of energy transfer
  • Sound waves, earthquakes
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15
Q

What is a transverse wave?

A
  • A wave with oscillations perpendicular to the direction of energy transfer
  • Electromagnetic waves
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Year 9 - Physics (2 decks)

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