2.4 The Nature of Waves Flashcards

1
Q

Progressive Wave

A

A pattern of disturbances travelling through a medium and carrying energy with it, involving the particles of the medium oscillating about their equilibrium position. Without the transfer of matter

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2
Q

Transverse Waves

A

The oscillations of the particles are at right angles to the direction of travel to the wave

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3
Q

Longitudinal Waves

A

The oscillations of the particles are in line with or parallel to the direction of travel of the wave

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4
Q

What is the symbol for Wavelength?

A

λ

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5
Q

What is the unit for Wavelength?

A

m, Meters

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6
Q

What is the symbol for Frequency?

A

f

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7
Q

What is the unit for Frequency?

A

Hz, Hertz

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8
Q

What are the base SI units for Frequency?

A

s-1

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9
Q

What is 1 Hz the equivalent of?

A

1 wave passing past a point per second

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10
Q

What is the unit for Amplitude

A

m, Meters

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11
Q

What is the symbol for the speed of a wave?

A

c

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12
Q

What is the unit for the speed of a wave?

A

ms-1, Meters per Second

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13
Q

What is the term Phase used to describe?

A

The relationship between the pattern of vibration of two points on a wave

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14
Q

Points which are oscillating in phase will be …

A

multiples of 360°

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15
Q

Points which are oscillating out of phase will be …

A

180° out of phase

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16
Q

c = f λ

A

c = Wave speed
f = Frequency of wave
λ = Wavelength of wave

17
Q

Polarised Wave

A

Is a transverse wave in which particle oscillations occur in only one of the directions at right angles to the direction of wave propagation

18
Q

Is it possible to polarise longitudinal waves?

A

No

19
Q

If two polaroid sheets are placed at 90° angle to each other …

A

No light is emitted due to the light not being able to be polarised in two directions at the same time