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Physics > Waves > Flashcards

Waves Flashcards

1
Q

What is ultrasound

A

Any sound above 20,000Hz

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2
Q

What is the human hearing range

A

20-20,000Hz

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3
Q

What is the order of wavelengths in order of increasing wavelength and decreasing energy

A

gamma rays, x-rays, ultra-violet rays, visible light, infra-red, microwaves, radio waves

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4
Q

What does frequency effect

A

The pitch

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5
Q

What does amplitude effect

A

The loudness

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6
Q

What is frequency measured in

A

Hz(Hertz)

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7
Q

What is amplitude measured in

A

dB

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8
Q

What are the different types of wave graphs you can get

A

Displacement-distance and displacement-time

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9
Q

How do you workout wave velocity

A

wave velocity = frequency x wavelength

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10
Q

How do you workout distance

A

distance = velocity x time

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11
Q

What are the frequency and time period equations

A

1 = frequency x time period

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12
Q

What is the definition of a transverse wave

A

A wave for which the oscillations are perpendicular to the direction of the energy transfer

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13
Q

What is the definition of a longitudinal wave

A

A wave for which the oscillations are parrallel to the direction of the energy transfer

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14
Q

What is an oscillation

A

A vibration

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15
Q

Examples of longitudinal waves

A

sound

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16
Q

Examples of transverse waves

A

Light or any electromagnetic wave

17
Q

What are the positives and negatives of gamma rays

A

treat cancer but kills living cells

18
Q

What are the positives and negatives of x-rays

A

Photographs but mutates cells

19
Q

What are the positives and negatives of ultraviolet

A

astronomy but it blinds

20
Q

What are the positives and negatives of visible light

A

photosynthesis but blinds

21
Q

What are the positives and negatives of infra-red

A

astronomy but burns

22
Q

What are the positives and negatives of microwaves

A

microwaves but internal heating

23
Q

What are the positives and negatives of radiowaves

A

satellite dishes and has no dangers

Physics (8 decks)

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