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Physics > Waves > Flashcards

Waves Flashcards

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1
Q

What is a wave?

A

A transfer of energy through a receptive pattern

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2
Q

Transverse wave

A

Particles that move perpendicular to wave motion

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3
Q

Longitudinal wave

A

Particles that move parallel to wave motion

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4
Q

Wavelength

A

Blue arrow
-Distance from to next repeating

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5
Q

Crest

A

Red dot
-point above equilibrium

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6
Q

Trough

A

Pink dot
-Point below equilibrium

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7
Q

Amplitude

A

Green arrow
-distance from equilibrium to max or min

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8
Q

Compression

A

Yellow box
-particles are close

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9
Q

Rarefraction

A

Purple box
-Particles are far apart

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10
Q

Medium

A

a material that moves energy or light from one substance to another
EX = A child creates small waves in a puddle on a sidewalk by tapping his finger on the water surface 3 times a second.

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11
Q

Mechanical wave

A

a wave that is an oscillation of matter and is responsible for the transfer of energy through a medium
EX = light, sound, waves in ocean

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12
Q

Electromagnetic wave

A

When a light wave encounters an object, they are either transmitted, reflected, absorbed, refracted, polarized, diffracted, or scattered depending on the composition of the object and the wavelength of the light.

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13
Q

Sound wave

A

Are longitudinal waves

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14
Q

Inverse/proportional relationships

A

Inverse = Frequency and period

-time period and wavelength are proportional

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15
Q

Eq for T (period)

A

T = total time / # of events

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16
Q

Eq for frequency (hz)

A

f = # of events / total time

17
Q

2 Eq for speed (v)

A

V = distance / time

V = f * wavelength

18
Q

Eq for one

A

1 = f * T

19
Q

Resonance & Interference

A

When two or more things have the exact same frequency
-Increases the amplitude & motion, transfers energy
(In sync)

20
Q

Destructive Resonance

A

Energy is transferred to the same energy
-Can have too much energy
-Amplitude got really big

21
Q

Interference & Superposition

A

When two waves meet in the same material (same type of material)

22
Q

Constructive interference

A

Crest meets a crest or a trough meets a trough they get super!
-Adds amplitude

23
Q

Destructive interference

A

Crest meets trough cancels each other out
-Amplitude gets smaller

24
Q

Mechanical waves like sound, water waves, and earthquakes require a medium (material) to travel through (T/F)

A

True

25
Q

Reflection

A

Change of direction when it meets its boundary
-Waves BOUNCE off boundary

26
Q

Refraction

A

Refraction involves a change in speed and path a wave takes when it passes through a boundary instead of bouncing off as in reflection.
-Waves CHANGE DIRECTION due to medium (speed)

27
Q

Diffraction

A

The spreading of waves as it passes through/around objects
-Waves CURVE AROUND the edge of boundary

Physics (12 decks)

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