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Physics > Waves > Flashcards

Waves Flashcards

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1
Q

Progressive wave

A

Carries energy from one place to another without transferring any material

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2
Q

Displacement

A

How far a point on a wave has moved from its undisturbed position

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3
Q

Amplitude

A

Maximum magnitude of displacement from the equilibrium position

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4
Q

Wavelength

A

Distance between successive particles that are oscillating in step

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5
Q

Frequency

A

Number of cycles of oscillations per second

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6
Q

Transverse waves

A

Vibrate at right angle to the direction of energy transfer

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7
Q

Longitudinal wave

A

Vibrate along the direction of energy transfer

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8
Q

Polarisation

A

Can only happen for transverse waves

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9
Q

Partially polarised light

A

If view reflected partially polarised light through a polarising filter at the correct angle you can block unwanted glare

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10
Q

Principle of superposition

A

When two or more waves cross the resultant displacement equals the vector sum of the individuals

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11
Q

Path difference

A

Amount by which the path travelled by one wave is longer than the path travelled by the other wave

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12
Q

Stationary waves

A

Superposition of two progressive waves with the same frequency and wavelength moving in opposite directions

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13
Q

Node

A

Where amplitude of vibration is zero

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14
Q

Antinode

A

Point of maximum displacement

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15
Q

Factors affecting resonant frequency

A

Length of string
Weight of string
Looseness of string

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16
Q

Period

A

Time for each particle to complete one oscillation

17
Q

Coherent

A

If two sources have the same wavelength and frequency and a fixed phase difference between them

18
Q

Monochromatic light

A

Light that has the same wavelength and frequency and so is the same colour

19
Q

Light diffraction pattern

A

Wavelength of light same side was the gap

See a bright central fringe with dark and bright fringes on either side

20
Q

Snells Law

A

N1sin@1=n2sin@2

Physics (8 decks)

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