Research On Physics Experiment Teaching In Middle School

Optics is an essential part of middle school physics teaching.Experiment is the foundation of optical research,and many laws of physics are summarized on the basis of experiments.As an indispensable part of physics teaching,experiment can not only cultivate students' interest,practical ability and thinking ability,but also help students master the laws of physics and knowledge.However,there are still some teachers of regional school who have the thought of emphasizing theory and belittling experiment,which has had a negative effect on the development of students.The author based on the research contents of graduate student period,through to mach-zehnder interference magnetic field sensor combination of theoretical analysis and experiment design,this paper discusses the significance of the experiment of high school physics teaching and teachers should maintain education concept in the process of experiment.The main research contents of this paper are as follows:The author designs and experimentally demonstrates a mach-zehnder interferometric magnetic field sensor based on single mode fiber-multimode-photonic crystal fiber-single mode fiber structure and magnetic fluid.The photonic crystal fiber use femtosecond laser to punch the hole,and the magnetic fluid is filled into the envelope of the photonic crystal fiber through the capillary effect.Multimode fiber enhances the excitation of high order mode and improves the sensitivity of magnetic field effectively.The wavelength sensitivity of the sensor in the magnetic field of 2m T to 20 m T is 0.07334nm/m T,and the magnetic field intensity sensitivity of-0.13 db /m T is obtained in 1m T and 20 m T magnetic field.All the optical fibers in the sensor structure are fused by the core splicing method,which improves the mechanical strength of the sensor structure and reduces the welding loss.Its compact structure,low cost and high mechanical strength are enough to prove its potential value in magnetic field sensing.Taking the mach-zehnder interferometric magnetic sensor as an example,this paper expounds the important role of teachers and the correct concept of education in the whole experiment.In the preparatory work before the experiment,the teacher focuses on the theoretical basis and focuses on the lecture.Experiment process,the teacher is more of the role of guidance,give full play to the students' own initiative,to cultivate students the fun in the process of the experiment.The teacher should pay more attention to the experimental process rather than the result of the experiment;the process of experiment results analysis,students under the guidance of teachers,to deal with the experimental results and compare the same kind of sensor,found the advantages and disadvantages,assessment of innovation,the optical fiber magnetic field sensor to make further improvements.Finally,the teacher summarized the whole experiment process to deepen the students' impression...