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Improving the experiment of water column carrying electronic sound signal based on the visible light communication technique

TANG Zhong-min;WANG Tai-jun;Department of Physics,Preparatory School of Education,Northwest University for Nationalities;Institute of Physics Education,School of Education,Northwest Normal University;  
There are several shortcomings existed in the physics textbooks currently used in middle school,which can display the transmission of light through a curved water column,but cannot display the information carried by the light.Therefore,the experiment of water column carrying electronic sound signal was developed based on the principles of LED visible light communication.The experiment took the bend water column as the light-guiding carrier,used the visible light to transport electro-acoustic signal.The improved experiment could demonstrate the two processes,light passing through the curving medium and carrying electronic sound signal,at the same time.It was convenient for students to understand the essence of optical communication in-depth.
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