国外物理宾验教学借鉴

物理学是一门以观察和实验为基础的科学.学生从物理实验中所获得的感性认识,探索能力和动手技巧等,不是直接讲述所能给予的.边学边实验的学习探索过程,更接近人类认识客观规律的过程,更有利于培养学生的观察能力、思维能力、探索精神以及良好的学习研究物理的方法.     

Comparison study of GaN films grown on porous and planar GaN templates

The GaN thick films have been grown on porous GaN template and planar metal-organic chemical vapor deposition(MOCVD)-GaN template by halide vapor phase epitaxy(HVPE). The analysis results indicated that the GaN films grown on porous and planar GaN templates under the same growth conditions have similar structural, optical, and electrical properties. But the porous GaN templates could significantly reduce the stress in the HVPE-GaN epilayer and enhance the photoluminescence(PL) intensity. The voids in the porous template were critical for the strain relaxation in the GaN films and the increase of the PL intensity. Thus, the porous GaN converted from β-Ga2O3 film as a novel promising template is suitable for the growth of stress-free GaN films.     

国外物理实验教学借鉴

物理学是一门以观察和实验为基础的科学.学生从物理实验中所获得的感性认识,探索能力和动手技巧等,不是直接讲述所能给予的.     

物理教学应在实验室中进行

运用实验法进行教学,是新课标实施以后的重中之重． 实验教学是物理教学的主要方法．近年来物理试卷对实验的考查,已从简单的背诵实验知识转向考查对实验的思想、原理、方法的理解上,重在考查学生的实验能力和综合分析能力．但目前物理教学中,实验教学仍是一个薄弱的环节．