在物理解题中常常会出现一些不符合题意的解 ,对这些解我们往往是依靠经验或凭借感觉认为其不合理而将其取舍 ,并没有去考虑其物理含义 .其实很多不合题意的解也都具有一定的物理意义 ,在原题的背景上分析和考查这些不合题意的解的可能的意义 ,不仅能使我们对原题合理的解更有 In the matter of understanding, there are often solutions that do not meet the meaning of the question. For these solutions, we often rely on experience or rely on feeling that it is unreasonable to choose it, and do not consider its physical meaning. In fact, many unworthy The solutions also have certain physical meanings. Analyzing and examining the possible meanings of these unresolved solutions on the background of the original questions not only enables us to have more reasonable solutions to the original questions.