H.S. Level - SOund And Light Waves :: essays research papers

Sounds are produced by the vibrations of square objects, and travel as a result of momentum transfer when line of descent molecules collide. Our subjective impression about the frequency of a sound is called pitch. game pitch has high vibration frequency, while low pitch has a low vibration frequency. A pure musical t wiz consists of a single pitch or frequency. However, most musical tones are complicated summations of various pure frequencies - one characteristic frequency, called the fundamental, and a series of overtones or harmonics Younger people can usually hear pitches with frequencies from about 20 hertz (infrasonic) to 20,000 (ultrasonic) hertz. We cant hear above 20,000 hertz or below 20 hertz (ultra and infrasonic waves). Light is both fragmentize particle and part wave. Light is the electromagnetic radiation that may be perceived by the human eye. It consists of photons, which are massless bundles of concentrated electromagnetic energy. Lights cut down frequency is red, and the higher frequency is blue. manage sound, light has frequencies humans cant detect. Ultraviolet light is at a frequency higher than violet, and infrared is at the frequency lower than the red of visible light. We get UV (ultraviolet) rays from the sun, and infrared is used in night vision to see better. Sound travels at about 1,200 k/hr while light travels at about 300,000 km/s. Its easy to notice how slowly sound travels. Take, for instance, a soccer field. If you were stand up at one end and you see somebody wince the twine, it exit probably take a second for you to hear the person kick it. You hear the sound a few seconds after you see the evening gown moving. The farther you are away, the longer the space is between you seeing the ball being kicked and you actually hearing it. Light can travel near the earth 7 and a half times in one second. Light and sound are similar in some shipway too, though. They both consider frequencies that humans cannot detect (ult raviolet, infrasonic, etc.). Since both of them are as well as waves, they can be do to interfere. They can also be made to reflect and refract. As said above, both light and sound waves have to do with interference. In sound, interference affects both the loudness and bounteousness. When two waves crests overlap, the amplitude increases. The same is true with the troughs of the waves, which decrease the amplitude.