3 Parts of waves 16 17 September 27, 2016 Entry: Date: Parts of Waves Std 8‐6.2 and 3 Oct 38:08 PM Divide page in half horizontally Oct 72:45 PM 1 3 Parts of waves 16 17 September 27, 2016 Transverse wave Crest Trough You will define the terms in top half Rest position Amplitude Wavelength Frequency Draw this wave BIG You will label the parts on Use the entire bottom half. this wave in bottom half Oct 72:42 PM Crest highest point on transverse wave Crest crest crest 2 3 Parts of waves 16 17 September 27, 2016 Trough ‐ Lowest point on a transverse wave trough trough trough Rest position undisturbed position of medium rest position rest position 3 3 Parts of waves 16 17 September 27, 2016 Amplitude ‐ measure of the amount of energy (strength) in a wave and is the distance between rest position and crest or trough amplitude amplitude amplitude Wavelength ‐ distance between two corresponding points on a wave, measures speed (be sure to draw the line from the center of crest or trough to the next center of crest or trough) wavelength wavelength wavelength 4 3 Parts of waves 16 17 September 27, 2016 Frequency The number of wavelengths that pass a given point in a given time. Higher frequency means more energy Oct 97:49 AM Oct 74:54 PM 5 3 Parts of waves 16 17 September 27, 2016 Your drawing should include ALL terms, similar to below. Oct 73:55 PM Divide page in half horizontally Oct 72:45 PM 6 3 Parts of waves 16 17 September 27, 2016 Compressional/longitudinal wave Compression You will define the terms here Rarefaction Wavelength Draw this wave BIG You will label the parts on Use the entire bottom half. this wave Oct 72:42 PM Compression where medium is squeezed together compression compression compression Oct 74:05 PM 7 3 Parts of waves 16 17 September 27, 2016 Rarefaction where medium is stretched apart rarefaction rarefaction Oct 74:31 PM Wavelength distance from beginning of compression to beginning of next compression wavelength wavelength Oct 74:37 PM 8 3 Parts of waves 16 17 September 27, 2016 Next page define the following terms and include illustration if provided Oct 74:55 PM Frequency number of wavelengths that pass a point per unit of time (sec) frequency 9 3 Parts of waves 16 17 September 27, 2016 Wave speed distance wave travels in a given time wave speed = wavelength(in m) x frequency(in Hz) Speed of wave depends on medium Fastest through solids, then liquid, slowest through gas EM waves ALL travel at same speed in space Oct 74:05 PM *Mechanical waves need a medium, travel slower then EM waves, can be transverse, or compressional, and include waves like: water waves, waves on a rope, strings in an instrument, and seismic waves. Oct 38:47 PM 10 3 Parts of waves 16 17 September 27, 2016 *Electromagnetic waves are faster, are only transverse waves, can travel in a medium and through empty space without a medium include: radio, microwave, infrared, visible light,ultraviolet, x-ray, and gamma ray Oct 38:51 PM Sep 239:32 AM 11
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