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A level Physics > Waves > Flashcards

Waves Flashcards

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1
Q

Progressive waves

A

Waves transfer energy. A wave is a disturbance or oscillation of matter or fields accompanied by a transfer of energy.

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2
Q

Mechanical waves

A

Transfer energy via the vibration of particles as they pass through a substance.

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3
Q

Examples of mechanical waves

A

sound, seismic, waves on a string (transverse) & waves on water.

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4
Q

Electromagnetic waves

A

Transfer energy Via oscillating electric and magnetic fields without the need for a substance.

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5
Q

Examples of electromagnetic waves

A

Radio, light, infa-red & X-rays.

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6
Q

Longitudinal waves

A

Oscillation of the particles is parallel to the energy transfer of the wave. With areas of compression and rarefaction. With the areas of compression moving along the wave as the particles move back and forth transferring the energy.

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7
Q

Examples of longitudinal waves

A

Sound, compression (shock) waves, primary seismic waves.

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8
Q

Transverse waves

A

Where the oscillation of the particles is perpendicular to the transfer of energy. With the up and down oscillation of the particles moving the particles behind it as the energy is transferred along the wave direction.

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9
Q

Examples of transverse waves

A

Electromagnetic , waves on a string, and secondary seismic waves.

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10
Q

Electromagnetic waves

A

Transverse waves that consists of 7 regions. They vary in frequency and wavelength, as well as in energy.

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11
Q

Speed of electromagnetic waves

A

3 x 10 ⬆️ 8 ms⬆️-1 in a vacuum

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12
Q

Examples of electromagnetic waves

A

radio waves, microwaves, infrared, visible light, ultraviolet, x-rays and gamma rays.

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13
Q

Measuring wave displacement

A

The distance of a point on a wave from the equilibrium or centre position.

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14
Q

Measuring wave amplitude

A

Maximum displacement of a wave.

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15
Q

Measuring wavelength

A

The distance in metres between two consecutive points on the wave that have the same displacement.

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16
Q

Measuring wave period

A

The time taken for one complete cycle of a wave, measured from a fixed position.

17
Q

Measuring wave frequency

A

The number of complete oscillations of the wave per unit time. The frequency is also the reciprocal of the period.

Frequency = 1/period

18
Q

Calculating wave speed, (c), word equation

A

Wave speed (ms ⬆️ -1) = frequency (Hz) x wavelength (m)

19
Q

Calculating wave speed, (c), symbol equation

A

c = f λ

20
Q

What did the neutrino say when it passed through a bar?

A

Nothing it passed straight through!

A level Physics (11 decks)

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