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physics > waves > Flashcards

waves Flashcards

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AP® Physics flashcards Physics 101 flashcards
1
Q

what are waves?

A

waves transfer energy from one place to another

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1
Q

whats the formula to calculate the speed of a wave?

A

D=St

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2
Q

whats D?

A

-distance
-measured in m

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3
Q

whats S?

A

-speed
-measured in ms-1

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4
Q

Whats t?

A

-time
-measured in s

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5
Q

whats wavelength?

A

-The distance between a point on one wave to the corresponding point on the next wave.
-lambda
-measured in m

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6
Q

whats speed (wave characteristic)?

A

The distance a wave travels in one second

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7
Q

whats frequency (wave characteristic)?

A

-The number of waves which pass a point in one second.
-Hz

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8
Q

Whats amplitude (wave characteristic)?

A

-The height of the wave measured from the centre to the top of the crest, or bottom of the trough.
-bigger amplitude= more energy wave carries
-meters

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9
Q

whats period (wave characteristic)?

A

time taken to produce a single wave

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10
Q

How do you calculate the frequency of waves?

A

f=N/t

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11
Q

whats a transverse wave?

A

the particles of the wave vibrate perpendicular to the direction of the wave

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12
Q

what are examples of transverse waves?

A

-water waves
-EM spectrum

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13
Q

Whats a longitudinal wave?

A

particles vibrate along the same line as the direction of the wave

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14
Q

example of longitudinal wave?

A

sound

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15
Q

why can sound not travel through space?

A

sounds cant pass through vacuums as they need particles to pass their vibration through

16
Q

whats the speed of sound in air?

A

340 ms-1

17
Q

whats the speed of light in air?

A

300,000,000 ms-1

18
Q

whats an oscilloscope?

A

shows whether a sound wave is loud or quiet, or has a high or low
frequency

19
Q

how do you detect loud sounds (oscilloscope)?

A

The greater the height of the wave pattern, the louder the sound.

20
Q

how do you detect high or low frequency (oscilloscope)?

A

The greater the number of waves, the greater the frequency or pitch.

21
Q

whats a human hearing frequency?

A

20-20,000Hz

22
Q

whats sound measured in?

A

decibels

23
Q

what is diffraction?

A

-the spreading of waves through or around an object
-longer wavelengths diffract more than shorter wavelengths

physics (6 decks)

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