PHYS 121 Lecture Notes - Lecture 16: Sonic Boom, Blueshift, Redshift
16 Nov 2017
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The subjective impression about the frequency of sound is called . Young person -> between about 20 and 20,000 hz. Limits of hearing range shrink especially at high frequencies. Red shift -> decrease in light frequency toward the red end of the spectrum. Waves superimpose directly on top of one another producing a wall . V-shape form of overlapping waves when object travels faster than wave speed. An increase in speed will produce a narrower v-shape of overlapping waves. Pattern of overlapping spheres that form a cone from objects traveling faster than. Shock waves --- 3d bow waves the speed of the wave. When something goes faster than the speed of sound. Most sounds are waves produced by vibration of matter. Ex. in a piano, violin, and a guitar, the sound is produced by the vibrating strings. Have a wavelength that is the distance between successive compressions or rarefactions. Radio loudspeaker is a cone that vibrates.
