원형북의 타격점 변화에 따른 진동 모드에 관한 연구

Abstract

Of the Korean percussion instruments, drum might be the most common thing to find easily around us. drum plays an important role to make a mood of Samulnori(the Korean traditional percussion quartet) or some events exciting with its simple tone. This instrument vibrates using a stationary wave. So we can see the vibrations through proper vibration mode in person. They are very similar to stationary waves which are made over a fixed string. Middle or high school students can visually confirm both the wave motion and the stationary waves through this instrument. The 7th education curriculum requires teachers charging a course of Physics to give more weight on Modern Physics as well as Classical Physics. According to the education curriculum of Physics, teachers should educate students how to understand complicate natural phenomena or how to solve problems using Physics and provide appropriate teaching guidelines for students to bring up abilities to study scientifically. In addition, it says the curriculum deals with microscopic world systematically and makes students observe the natural phenomena in a totally new way. However, students seem like Physics is one of the most difficult subject and get to lose their interest in it, especially Modern Physics. Therefore, we have to select various subjects or substances and study them scientifically to cause their interest and curiosity in the curriculum. Also it is important for educators to help students understand the general idea of Physics easily and set up the well-organized conceptual system of the subject. Accordingly, I've tried to deal with the vibration mode of drum using quantum mechanics to make a relation with Modern Physics. Molecular Orbital theory in quantum mechanics - educated in a Chemistry curriculum at high school- is a model of electron's probability distribution. It is quite difficult for students to understand its concept as especially material wave is neither visible nor touchable. Therefore, I think that if students see such waves through vibration mode of drum it would bring about much bigger visible effect. Using proper vibration modes of drum which has been proven theoretically, first, on the assumption that a radius is fixed, observe the change of boundary lines when an angle of vibrator is moved to make vibrations. Second, fix the angle now and observe which point will make its vibration mode, first and check the time when the radius is changed. Through these two experiments, we compare the point of vibrator which is named as a radius R and an angle of direction with the probability density to find electrons in hydrogen's atomic model. Plus, we try to explain the point that shows the highest probability density of electrons in atomic structure. The goal of this study is to explain quantum mechanics to students more easily as they can observe the point that has high probability to find electrons in person.