探究地磁场对彩色显像管成像的影响

Exploring the Influence of Geomagnetic Fieldon the Imaging of Color Kinescope

关于显像管电视机的成像原理,高中物理教材仅关注运动的带电粒子在偏转线圈提供的磁场中的偏转.但在实际生活中,地磁场也会对电视机显像管中运动带电粒子的轨迹产生影响.本文立足于高中生的认知能力,从生活实例出发,分析地磁场对彩色显像管成像的影响,细化建模过程,给出真实参数,凸显科学研究方法在教学中的应用,使教学内容与现代科技和生活实际相联系,从而将培养学生的核心素养落实在日常教学之中.

As for the imaging principle of kinescope TV,physics textbooks for senior high school only focus on the deflection of moving charged particles in the magnetic field provided by the deflection coil.But in real life,the geomagnetic field will also affect the trajectory of moving charged particles in the kinescope.Based on the cognitive ability of senior high school students,this paper analyzes the influence of geomagnetic field on the imaging of color kinescope,refines the modeling process,gives the real parameters,and highlights the application of scientific research methods in teaching,so as to connect the teaching content with modern technology and the reality of life,and implement the cultivation of students′core literacy in daily teaching.