College Physics ›› 2021, Vol. 40 ›› Issue (10): 36-.doi: 10.16854 / j.cnki.1000-0712.210147

Previous Articles     Next Articles

Design experiment of university physics: research on demonstration device of Lissajous graphic

WU Han¹，YU Yao¹，YOU Yin-tao¹，TANG Yong-jun¹，ZHANG Jin-long²   

  1. 1. School of Physical Science and Technology，Shanghai Tech University，Shanghai 201120，China; 2. School of Physics Science and Engineering，Tongji University，Shanghai 200092，China
  • Received:2021-03-24 Revised:2021-03-24 Online:2021-10-15 Published:2021-10-15

PDF (PC)

2266

Like

Abstract: In this paper，a comprehensive design experiment of university physics，the self-making

Lissajous graphic demonstration device is introduced. The reason why Lissajous figures is formed

through theoretically analy- zing the thin film ' s forced vibration. The experimental

results show that the shape and size of Lissajous figures change periodically when the

frequency of the sound source increases. Finally，the effective surface tension value is estimated

to be about 46.00 N / m through the measured resonance frequency when the surface area of latex

ballon is twice the normal area，indicating that the device has certain practical applicability.

Key words: design experiment, forced vibration, Lissajous graphics, resonance frequency, surface tension

Copyright © 2018 College Physics, All Rights Reserved.
Powered by Beijing Magtech Co. Ltd