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Physics > Waves > Flashcards

Waves Flashcards

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1
Q

Wave

A

oscillation, cause transfer energy, displacement around a point

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2
Q

Transverse wave

A

particles’ vibrations are perpendicular to direction of energy transfer

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3
Q

Wave length

A

distance 2 corresponding points

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4
Q

Frequency

A

number of waves passing a fixed point per second

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5
Q

Period

A

time taken for a wave to pass a fixed point

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6
Q

Amplitude

A

maximum displacement of oscillation from equilibrium

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7
Q

Longitudinal wave

A

particles’ vibrations are parallel to the direction of energy transfer

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8
Q

Compression

A

area where particles are squeezed together

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9
Q

Rarefraction

A

area where particles are stretched apart

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10
Q

Wave speed equation

A

v = f x wavelength

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11
Q

Ripple tank

A

vibrating wave creates waves, lamp, freeze frame for frequency and length

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12
Q

Are EM waves transverse of longitudinal?

A

transverse

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13
Q

Electromagnetic wave

A

vibrations through a vacuum

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14
Q

Mechanical waves

A

Vibrations through a medium

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15
Q

Sound waves

A

longitudinal, 20-20,000Hz

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16
Q

Why do speed waves travel at a higher speed in a more dense medium?

A

frequency is a constant

17
Q

What is frequency proportional to?

A

pitch

18
Q

Volume is proportional to. . .

A

Amplitude

19
Q

How to detect sound

A

defined space, make sound, detect echo, measure time, 2d/ t

20
Q

Process of hearing

A

vibrations in air, eardrum, ear bones, cochlear hairs, auditory nerve

21
Q

Microphone process

A

sound vibrations, pressure flexible diaphragm, coil, voltage, current flows

22
Q

Ultrasound

A

20kHz, cleaning jewellery, industrial imaging (diffuse?), echolocation, medical imaging (partial reflection)

23
Q

Why is medical imaging safe?

A

waves are partially reflected, not absorbed + limited exposure

Physics (15 decks)

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