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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.

Page 3: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

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

Page 4: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Page 5: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Compression

Page 6: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

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

Page 7: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Half the difference in height between the crest and the trough of a wave

Page 8: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

high point of a wave

low point of a wave

Page 9: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Region in which the waves are packed closely together

Wavelengths are shorter

Region of waves that are less closely packed together

Longer wavelength

Compression

Page 10: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Page 11: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Compression

Page 12: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Waves that occur when the medium is fixed at both ends

Occurs as both transverse or compression waves

Page 13: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Page 14: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

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.

Page 15: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Page 16: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

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.

Page 17: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Page 18: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

mutual action of two waves of the same frequency reinforcing or neutralizing each other

Page 19: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

series of colored bands diffracted and arranged in order of wavelengths

Page 20: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Page 21: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Visible Spectrum – Light we can see›Roy G. Biv – Acronym for Red,

Orange, Yellow, Green, Blue, Indigo, & Violet.› Largest to Smallest Wavelength.

Page 22: © 2000 Microsoft Clip Gallery. Waves (Def.) – a disturbance that carries energy but not matter from one place to another Medium – Substance or region

Invisible Spectrum›Radio WavesLongest wavelength & lowest

frequency.Uses – Radio & T.V.

broadcasting.

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