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science > Waves > Flashcards

Waves Flashcards

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1
Q

In transverse waves what are the vibrations to the direction of Energy transfer

A

Perpendicular

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2
Q

What are examples of transverse waves

A

Light all the other EM waves
Ripples on water
Waves on a string

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3
Q

What are examples of longitudinal waves

A

Sons waves
ultra sound
Shock waves

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4
Q

In longitudinal waves the vibrations are what to the direction of energy transfer

A

Parallel

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5
Q

Wave speed=

A

Frequency (times) wavelength

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6
Q

What is the frequency

A

The number of complete waves passing a certain point per second or

the number of waves produced by a source each second

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7
Q

What can all waves be

A

Reflected
Refracted
Diffracted

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8
Q

What is the law of reflection

A

Angle of incidence = angle of reflection

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9
Q

What does refracted mean

A

They go through a new material but change direction

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10
Q

What does diffracted mean

A

The waves bend round obstacles causing the waves to spread out

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11
Q

How can light be diffracted

A

If there is a really small gap

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12
Q

How can waves only be refracted

A

If they meet a new median at an angle

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13
Q

What are radio waves mainly used for

A

Communication

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14
Q

How can waves be transmitted all over the world

A

Because long wavelengths diffract around curved surfaces of the earth

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15
Q

What are radio waves used for

A

TV

Fm radio

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16
Q

How are short wave signals reflected

A

Off the ionosphere

17
Q

What are microwaves used for

A

Satellite communication

Mobile phones

18
Q

Can radio waves pass through earths watery atmosphere

A

No

19
Q

What are infared waves used for

A

Remote controls

Optical fibres

20
Q

What is visible light used for

A

Photography

21
Q

How does a camera work

A

Uses a lens to focus visible light onto a light sensitive film or electronic sensor

22
Q

What does a lens aperture do

A

Controls how much light enter the camera

23
Q

What are sound waves caused by

A

Vibrating objects

24
Q

Can sound travel in space

A

No because it is mostly a vacuum

25
Q

What can sound waves do

A

Reflect

Refract

26
Q

What are echos

A

Reflected sound waves

27
Q

Does objects absorb sound

A

Yes

28
Q

What do high frequency sound waves sound

A

High pitched

29
Q

How do low frequency sound waves sound

A

Low pitched

30
Q

What is the frequency

A

The number of complete vibrations each second

31
Q

What does a high frequency also mean

A

Shorter wave lengths

32
Q

What does the loudness of depend on

A

It’s amplitude

33
Q

The bigger the amplitude…

A

The louder the sound

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