waves Flashcards

1
Q

what is amplitude

A

distance from the equilibrium position to the point of maximum displacements

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2
Q

longitudinal waves

A

there oscillations are parallel to energy transfer. particles vibrate parallel to the wave direction

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3
Q

transverse waves

A

there oscillations are perpendicular to energy transfer. particles vibrating perpendicular to the wave direction

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4
Q

what is the wave equation

A

v = y x f
wavespeed = wavelength x frequency

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5
Q

what is time period

A

time it takes for one wavecycle

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6
Q

phase

A

the phase of a wave is just a point on a wave

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7
Q

what is the phase difference

A

the difference between two point on a wave in units of degrees or radions.

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8
Q

example of a longitudinal wave

A

sound waves

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9
Q

example of a transverse wave

A

EM spectrum

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10
Q

what is the first step of the motion of particles on a wave

A

the particle moves upward perpendicular to the wave direction

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11
Q

what are the 2 types of superstition

A

constructive and deconstructive

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12
Q

what is the second step of the motion of particles on a wave

A

the particles moves through the equilibrium position

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13
Q

what is superposition

A

superposition is where two or more waves combine together

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14
Q

what is the third step of the motion of particles on a wave

A

it continues upward until it reaches the crest

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15
Q

what happens in superposition in a constructive wave

A

amplitude increases

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16
Q

what is the last step of the motion of particles on a wave

A

the particle then moves downward moving back through the equilibrium position and eventually reaches the trough

17
Q

what happens in superposition in deconstructive interference

A

amplitude decreases (extreme case = waves cancel each other out)

18
Q

what is polarisation

A

waves are polarised if they are vibrating parallel to eachother

19
Q

how can we polarise life

A

only the waves vibrating parallel to the slits get through

20
Q

what is the time period

A

time it takes for one wave cycle

21
Q

what is the time period equation

22
Q

what is the node

A

point of zero displacement

23
Q

what do progessive waves do

A

move forward in space
transfer energy outwards
EM waves, sound waves

24
Q

waht is the antinode

A

point of maximum displacement

25
what do stationary waves do
trapped between two points energy is stored between the two points musical instrument, vibration on bridges
26
standing waves equation
wavelength = length of string/ number 9f waves
27
what happens to stationary waves on a string
when a string is vibrated at certain frequencies, stationary waves can form. the different stationary waves that can form are called harmonics
28
how many waves are in the EM spectrum
7
29
what is the frequency, and what is it measured in
measured in Hz, and number of waves per second
30
what is the two things on a longitudinal wave
rarefraction (spaced out part) compression (packed part)
31
what is pnmm bu kmg
pico, nano, micro, milli. Base unit. kilo, mega, giga
32
what is time period measure in
seconds