Sem2 Physics Final Key Points 3

Created by ellenbarhorst 

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sound waves, light

sound waves

longitudinal waves formed by vibrations

rarefactions

pulse of low pressure air, spaced out molecules

compressions

pulse of compressed air, pushed-together molecules

relationship frequency and pitch

high pitched= high frequency
low pitched= low frequency

doppler effect

wave source approaches, an observer encounters waves with a higher frequency. waves source moves away, an observer encounters waves with lower frequency

sound speed with temp and density

higher temp=faster sound
lighter density=faster sound

forced vibrations

when an object is made to vibrate by another vibrating object nearby

resonance

when the frequency of a forced vibration on an object matches the objects natural frequency, equals louder sound/increased amplitude

electromagnetic wave

a light wave thats partly electric and partly magnectic produced by accelerating electric charges

electromagnetic spectrum

radio, micro, infrared, light, ultraviolet, x-ray, and gamma

electromagnetic wave speed

...

red+blue light=

magenta

red+green light=

yellow

blue+green light=

cyan

all light=

white

white pigment and black pigment

...

polarization

the aligning of vibrations in a transverse wave, usually by filtering out waves of other directions,

law of reflection

angle of reflection=angle of incidence

bending light

...

flat mirror images

...

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