waves Flashcards

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1
Q

what do waves transfer?

A

they transfer energy

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2
Q

what is the wavelength of a wave?

A

the distance between the top of each wave

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3
Q

what is the amplitude of a wave?

A

the distance from the top of the wave to the middle line

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4
Q

what is the frequency?

A

the number of waves that pass in a certain time

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5
Q

if you increase the frequency, what else increases?

A

velocity increases

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6
Q

if you increase the wavelength, what else increases?

A

velocity increases

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7
Q

what are the two types of waves?

A

transverse waves and longitudinal waves

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8
Q

what are transverse waves?

A

waves that vibrate perpendicular to the direction of the wave, they are S waves, they are light waves

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9
Q

what are longitudinal waves?

A

waves that vibrate parallel to the direction of the wave, they are P waves, they are sound waves

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10
Q

what happens when a wave passes through something denser? (air to glass)

A

the wave refracts when it enters the object and then returns to its normal position after it comes out of the object, the speed decreases, the wavelength decreases

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11
Q

what happens during reflection on a smooth surface?

A

waves reflect off a flat surface, the smoother the surface the stronger the reflected wave

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12
Q

what happens when reflecting on a rough surface?

A

the light scatters in all directions so it won’t look reflective, instead it will look matte

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13
Q

what is the angle of incidence equal to?

A

the angle of reflection

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14
Q

what is transmission

A

where waves pass through a transparent material

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15
Q

what happens the more transparent an object gets in transmission?

A

the more transparent, the more light will pass through the material

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16
Q

what type of wave does glass use in visible light?

A

transmitting wave and refracting wave

17
Q

when are our collects sound, where does it go through?

A

the ear canal

18
Q

what happens to the energy as the frequency increases?

A

the more energy there is meaning it can damage the ear more quickly

19
Q

we have evolved to not need to hear very high or low frequencies, what does this mean for the ear?

A

the ear only works for a limited frequency range

20
Q

what is an ultrasound and what are its uses?

A

a sound wave with a frequency higher than 20,000Hz
uses: medical imaging, measuring distances in industry, detecting flaws in materials

21
Q

what is infrasound and what are the two types?

A

a sound wave with a frequency lower than 20Hz and are known as seismic waves
the two types are P and S waves

22
Q

what are P waves?

A

they are longitudinal and are able to pass through solids and liquids

23
Q

what are S waves?

A

they are transverse and only pass through solids making them slower

24
Q

what are infrasounds used for?

A

to explore the earths core