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Physics 7 > Waves > Flashcards

Waves Flashcards

1
Q

propagation of disturbance through a medium in which the energy is transferred

A

Wave

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2
Q

carries the wave

A

Medium

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3
Q

wave’s movement is perpendicular to its medium

A

Transverse wave

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4
Q

wave’s movement is parallel to its medium

A

Longitudinal wave

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5
Q

needs medium so that its energy will be transmitted

A

Mechanical wave

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6
Q

doesn’t need medium so that its energy will be transmitted

A

Electromagnetic wave

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7
Q

highest point of wave

A

Crest

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8
Q

lowest point of wave

A

Trough

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9
Q

distance of any point of the wave from the rest point

A

Amplitude

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10
Q

rest to crest

A

Positive amplitude

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11
Q

rest to trough

A

Negative amplitude

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12
Q

distance between 2 consecutive rests or troughs

A

Wavelength

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13
Q

number of waves passing a given point within a second expressed in Hertz (Hz)

A

Frequency

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14
Q

how fast a wave travels (wavelength * frequency)

A

Wave speed/velocity

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15
Q

form of energy produced when air molecules vibrate and move in pattern known as sound waves

A

Sound

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16
Q

vibrations of the medium create a series of compression and rarefraction

A

Sound waves

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17
Q

highness or lowness of sound

A

Pitch

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18
Q

amount of energy a sound wave produces

A

Intensity

19
Q

sensation of the ear that intensity of sound produces measured by using the Decibel System (dB)

A

Loudness

20
Q

used to distinguish between 2 different sounds that have the same pitch and loudness

A

Timbre or Quality

21
Q

can be heard by human ear (ranges fro 20 Hz to 20000 Hz)

A

Audible Sound

22
Q

can’t be heard by human ear (below 20 Hz)

A

Infrasonic Sound

23
Q

can’t be heard by human ear (above 20,000 Hz)

A

Ultrasonic Sound

24
Q

bouncing off of sound waves

A

Reflection of Sound

25
Q

bending of sound wave due to its change in speed

A

Refraction of Sound

26
Q

bending or diffract as the waves travel around the corners of obstacles

A

Diffraction of Sound

27
Q

result of 2 or more sounds (waves overlapping)

A

Interference of Sound

28
Q

when an object vibrates at same natural frequency as a second object and forces that object into motion

A

Resonance

29
Q

change in wave frequency due to a moving source

A

Doppler Effect

30
Q

transverse, electromagnetic wave that can be seen by humans (speed in vacuum = 3 x 10^8 m/s)

A

Light

31
Q

associated with electromagnetic radiation of a certain range of wavelengths visible to the human eye

A

Color

32
Q

phenomenon in which a prism separates white light into its component colors

A

Dispersion

33
Q

portion of the electromagnetic spectrum that is visible to the human eye

A

Visible Light Spectrum

34
Q

power of light

A

Intensity (Light)

35
Q

qualitative expression of light intensity

A

Brightness

36
Q

quantity of visible light that is emitted in unit time per unit solid angle expressed in Candela (cd)

A

Luminous intensity

37
Q

material that absorbs light

A

Opaque material

38
Q

material that allows light to easily pass through

A

Transparent material

39
Q

material that only allows some light to pass through

A

Translucent material

40
Q

light bounces off the surface

A

Reflection of Light

41
Q

bending of light as it passes through materials of different optical density

A

Refraction of Light

42
Q

bending of light around obstacles in its path

A

Diffraction of Light

43
Q

light can superimpose and can either have constructive or destructive interference

A

Interference of Light

44
Q

light is reflected completely at the boundary between 2 mediums

A

Total Internal Reflection

Physics 7 (4 decks)

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