The main characteristics of ultraviolet radiation is strong chemical action, but, the new course standard of high school physics textbooks do not have a visible, tangible experiments to verify the ultraviolet has high energy, causing chemical changes of matter, student’s perceptual knowledge is poor. In order to enhance the student’s perceptual knowledge, to facilitate the students’ memory, improve teaching effect, we design a demonstration experiment—“ Ultraviolet chemical effect demonstration instrument ”, can verify the ultraviolet ray has the high energy in 3 minutes, cause chemical changes of matter.%紫外线的主要特性是化学作用强，但是现行新课标高中物理教材中没有一个看得见、摸得着的实验来验证紫外线具有较高的能量，进而引起物质的化学变化，学生的感性认识较差。为了增强学生的感性认识，便于学生记忆，优化教学效果，设计一个演示实验——“紫外线化学作用演示仪”，能够在三分钟内验证紫外线具有较高的能量，引起物质的化学变化。
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