Waves Flashcards

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1
Q

1st Harmonic

A

Lowest f at which Stat. Wave is formed

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2
Q

Coherence

A

Sources that emit waves with same f and constant Phase difference

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3
Q

Absolute n

A

Ratio speed of wave through vacuum / Speed of wave through medium

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4
Q

Relative n

A

Ratio speed wave in 1 medium / speed of wave in another

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5
Q

Phase

A

2 points on wave oscillate with same v + s at same t

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6
Q

Antiphase

A

2 points on wave oscillate equal but opposite v and s at same t

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7
Q

Phase Difference

A

Fraction of cycle between vibrations of 2 particles

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8
Q

Refraction

A

Wave changes direction as it moves from one medium to another with different density

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9
Q

=

A

=

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10
Q

Diffraction

A

Wave moves through gap. If wavelength = Gap size, wave tends to spread in ALL directions.

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11
Q

Transverse

A

can be polarised. perp

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12
Q

Longitudinal

A

no polarised. Parallel

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13
Q

Resonant F

A

occur when distance between 2 fixed ends is an intenger multiple of half wavelengths.

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14
Q

ProgrEssive waves PRONOMAT

A

transfer energfy from one place to another, without transferring any of the matter they are travelling through

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15
Q

Absorption

A

Loses energy, reduces A, Loss of info

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16
Q

Constructive Interference

A

when crests of 2 waves coincide, combine to create amplified wave

17
Q

Internal Reflection

A

Light speeds up when enetering less optically dense medium

18
Q

TIR

A

Ai = CA, light travel along boundary of two mediums. Ai > CA, all light reflected.

19
Q

Superposition

A

Occurs when 2 waves of same type meet

20
Q

Monochromatic

A

Light of equal wavelength