论文部分内容阅读
物理教学应密切联系科学、技术和社会(STS),近年来高考中就有不少联系现代科技的试题,这类题目选材灵活,立意新颖,给人以耳目一新的感觉.下面就让我们来赏析从2013年高考试题中选出的几道题目.1光电效应例题1(北京卷第20题)以往我们认识的光电效应是单光子光电效应,即一个电子在时间内能吸收到一个光子而从金属表面逸出.强激光的出现丰富了人们对于光电效应的认识,用强激光照射金属,由于其光子密度极大,
Physical teaching should be closely linked to science, technology and society (STS), in recent years there are many links to modern college entrance examination exam questions, such topics selection flexible, innovative novel, giving a fresh feeling. Let us appreciate the following Selected from the 2013 college entrance examination questions.1 Photoelectric effect Example 1 (Beijing Volume 20) In the past we know the photoelectric effect is the single photon effect, that is, an electron can absorb a photon in time from Metal surface to escape. The emergence of strong laser to enrich people’s understanding of the photoelectric effect, with strong laser irradiation of metal, due to its extremely high photon density,