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Physics > Topic 5 - Waves > Flashcards

Topic 5 - Waves Flashcards

(45 cards)

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1
Q

What is the definition for Oscillation?

A

A repeated movement about a central position (eg up and down or back and forth)

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2
Q

What is the definition for Frequency?

A

The number of waves passing a point per second (measured in Hertz, Hz)

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3
Q

What is the definition for Wave speed?

A

The speed at which the wave is travelling (measured in m/s)

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4
Q

What is the definition for Longitudinal?

A

A wave in which the oscillations are parallel to the direction of energy transfer

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5
Q

What is the definition for Transverse?

A

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

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6
Q

What is the definition for Compression?

A

The section of a longitudinal wave in which the matter has bunched together

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7
Q

What is the definition for Amplitude?

A

The height of a wave peak, measured from the central point of the oscillation

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8
Q

What is the definition for Period?

A

The time it takes for one complete wave to pass a point

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9
Q

What is the definition for Wavelength?

A

The distance between two successive peaks or troughs (measured in metres)

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10
Q

What is the definition for Rarefaction?

A

The section of a longitudinal wave in which the matter has spread apart

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11
Q

What are the 2 types of waves? (2)

A

Longitudinal and transverse

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12
Q

Describe what a transverse wave is?

A

the particles oscillate at 90o to the direction of energy transfer (the direction the wave energy travels in)

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13
Q

Describe what a longitudinal wave is?

A

the particles oscillate forwards and backwards parallel to the direction of energy transfer (direction of propagation of wave energy).

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14
Q

Give an example of 2 transverse wave? (2)

A
  1. water waves
  2. light
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15
Q

Give an example of a longitudinal wave?

A
  1. sound waves
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16
Q

What is the equation for wave speed? (give units)

A

Velocity v (m/s) = frequency f (Hz) x wavelength λ (m)

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17
Q

What are the sources of Radio waves?

A

Broadcasting and communications

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18
Q

What are the sources of Microwaves?

A

Cooking and satellites transmitters

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19
Q

What are the sources of Infrared (IR)?

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A

Heaters, night vision equipment

20
Q

What are the sources of Visible light?

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A

Optical fibers and photography

21
Q

What are the sources of Ultraviolet (UV)?

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A

Fluorescent lamp & tanning lamp

22
Q

What are the sources of X-rays?

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A

Observing the internal structure of objects and materials, including for medical applications

23
Q

What are the sources of Gamma rays?

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A

Sterilising food and medical equipment

24
Q

What are the detectors of Radio waves?

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A

Radio and TV aerials

25
What are the detectors of Microwaves?
Microwave recivers
26
What are the detectors of Infrared (IR)?
Skin, blackened thermometer, special photographic film
27
What are the detectors of Visible light?
the eye, photographic film, light-dependent resistors
28
What are the detectors of Ultraviolet (UV)?
Skin, photographic film and some fluorescent chemicals
29
What are the detectors of X-rays?
Photographic film
30
What are the detectors of Gamma rays?
Geiger - Müller tube
31
What are the users of Radio waves?
long, medium and short wave radio, TV (UHF)
32
What are the users of Microwaves?
Mobile phone and satellite communication, cooking
33
What are the users of Infrared (IR)?
Infrared cookers and heaters, TV and stereo remote controls, night vision
34
What are the users of Visible light?
seeing, communication (optical fibers), photography
35
What are the users of Ultraviolet (UV)?
Fluorescent tubes and UV tanning lamps
36
What are the users of X-rays?
X-radiography to observe the internal structure of objects, including human bodies
37
What are the users of Gamma rays?
Sterilising equipment and food, radiotherapy
38
What is the equation for frequency?
F (Hz) = 1/period (s)
39
What are the effects of microwaves?
Internal heating of body tissue
40
What are the effects of infrared?
Skin burns
41
What are the effects of ultraviolet?
Damage to surface cells, blindness, skin cancer
42
What are the effects of gamma rays?
Cancer, mutation
43
Order from highest frequency to lowest frequency
Gamma X - ray Ultraviolet Visible light Infrared Microwave Radio waves
44
Order from longest to shortest wavelength?
Radio wave Microwave Infrared wave Visible light Ultraviolet X - ray Gamma rays
45
Order of least to most harmful?
Radio wave Microwave Infrared wave Visible light Ultraviolet X - ray Gamma rays

Physics (13 decks)

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