“光电效应”是现行高中物理下册第八章《光的本性》的重点内容。这一节的教学目的是,通过实验与讲解使学生对光的粒子性和“光电效应”的规律有较深刻的认识,同时培养学生研究物理现象、探索物理规律的兴趣与能力。本文就回答学生提出的问题,谈如何启发学生运用“类比”的思维方法去深入理解教材的一点体会。学生在解答课本第277页第7、8两道实验习题后,向我提出了这样的问题:根据爱因斯坦方程Εk=hv-W,在解答第7题时,为了在光电效应实验中求得被光照金属的逸出功W,就必须先知道普朗克常数h;在解答第8题时,为了求得普朗克常数h,就必须先知道被光照金属的逸出功W。那 The “photoelectric effect” is the key content of the eighth chapter “the nature of light” in the current High School Physics. The purpose of teaching in this section is to enable students to have a deeper understanding of the particle's properties of light and the law of “photoelectric effect” through experiments and explanations. At the same time, students should be trained to study physical phenomena and explore the interest and ability of physical laws. This article will answer questions raised by students about how to inspire students to use “analogy” way of thinking to understand the teaching material. Students in the textbook on page 277 after the first two experiments on the 7th and 8th questions, to me raised the question: According to the Einstein equation Εk = hv-W, in the answer to Question 7, in order to seek in the photoelectric effect experiment In order to find the Planck's constant h, we must first know the Planck's constant h. When solving the eighth problem, we must first know the work function W of the irradiated metal. that