© 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter...
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Transcript of © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter...
© 2000 Microsoft Clip Gallery
Waves (Def.) – a disturbance that carries energy but not matter from one place to another
Medium – Substance or region through which a wave is transmitted.
Speed of Waves – Depends on the properties of the medium.
Transverse Waves› Energy travels
perpendicular (at a right angle) to the direction of motion
› Carries energy from one point to another
› Has wavelength, crest, trough, and amplitude
› Example: light waves
Longitudinal (Compression) Waves› Energy travels parallel
to (in the same direction as) the direction of motion
› Carries energy from one point to another
› Has wavelength and regions of compression and rarefaction
› Example: sound waves
Compression
Transverse Waves› Distance from one crest to the next crest on a wave› Can also be measured from one trough to the next
trough
Longitudinal (Compression) Waves› Distance between maximum compressions
Half the difference in height between the crest and the trough of a wave
high point of a wave
low point of a wave
Region in which the waves are packed closely together
Wavelengths are shorter
Region of waves that are less closely packed together
Longer wavelength
Compression
Compression
Waves that occur when the medium is fixed at both ends
Occurs as both transverse or compression waves
Bouncing back of light waves›Regular—mirrors smooth
surfaces scatter light very little. Images are clear & exact.›Diffuse reflection – reflected light
is scattered due to an irregular surface.
Refraction – Bending of light due to a change in speed. › Index of Refraction – Amount by which a material
refracts light.› Prisms – Glass that bends light. Different frequencies
are bent different amounts & light is broken out into different colors.
mutual action of two waves of the same frequency reinforcing or neutralizing each other
series of colored bands diffracted and arranged in order of wavelengths
© 2000 Microsoft Clip Gallery
Visible Spectrum – Light we can see›Roy G. Biv – Acronym for Red,
Orange, Yellow, Green, Blue, Indigo, & Violet.› Largest to Smallest Wavelength.
Invisible Spectrum›Radio WavesLongest wavelength & lowest
frequency.Uses – Radio & T.V.
broadcasting.
© 2000 Microsoft Clip Gallery