ko homework Flashcards

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1
Q

Amplitude

A

Height from centre line

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2
Q

Wavelength

A

The distance from peak to peak

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3
Q

Frequency

A

The number of waves passing a point each second

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4
Q

Period

A

The time for one wave to pass a given point

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5
Q

Oscillation

A

Movement back and forth

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6
Q

Wave

A

Transfer of energy with no transfer of particles

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7
Q

Transverse wave

A

Oscillations are perpendicular to the direction of energy transfer (e.g. EM wave, ripples on water)

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8
Q

Longitudinal wave

A

Oscillations are parallel to the direction of energy transfer (e.g. sound).

Show areas of compression and rarefaction (spread out)

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9
Q

Use of radio waves

A

Television and radio

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10
Q

Why are radio waves suitable for television and radio?

A

Reflected by ionosphere (the ionized part of the Earth’s atmosphere) so can broadcast over long distances.

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11
Q

Use of microwaves

A

Satellite communications, cooking food

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12
Q

Why are radio waves suitable for satellite communications and cooking food?

A

Able to pass through the atmosphere to satellites. Has a heating effect.

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