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Physics > Waves > Flashcards

Waves Flashcards

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1
Q

Transverse waves definition and example

A

Travel at 90* to the oscillation that caused them

Eg: Mexican, light

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2
Q

Longitudinal waves definition and example

A

Travel parallel to the oscillation that caused them

Eg: sound

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3
Q

Radio wave uses

A

Communication
Broadcast
RADAR

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4
Q

Radio wave danger

A

Probably none

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5
Q

Microwave uses

A

Satellite communication

Cooking

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6
Q

Infrared uses

A

Radiant heaters
Grills
Remote controls
Thermal imaging

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7
Q

Microwave dangers

A

Internal heating of body tissues

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8
Q

Infrared dangers

A

Burning of tissues

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9
Q

Visible light uses

A

Seeing
Optical fibres
Photography

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10
Q

Frequency time period equation

A

Frequency = 1/ time period

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11
Q

Visible light dangers

A

Bright light can damage eyes

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12
Q

Ultraviolet use

A

Fluorescent tubes
Tanning
Security marking

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13
Q

Ultraviolet dangers

A

Blindness

Surface cell damage

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14
Q

X-ray use

A

Imaging internal structures of the body and other objects

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15
Q

X-ray danger

A

Cancer

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16
Q

Gamma rays danger

A

Cell mutation

Cancer

17
Q

Gamma rays use

A

Bacteria in food
Sterilise medical equipment
Treat tumours

18
Q

Wave speed equation

A

Wave speed = wavelength x frequency

19
Q

Wave front definition

A

Plane joining points on a wave which are at the same point in their cycle

20
Q

Human frequency range

A

20- 20,000 Hz

21
Q

amplitude definition

A

distance between the equilibrium line (0 displacement) and the maximum of a wave (typically the peak)

22
Q

peak definition

A

maximum positive displacement

23
Q

trough

A

maximum negative displacement

24
Q

wavelength definition

A

The distance between two like points on a wave

Physics (5 decks)

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