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会发光的材料

会发光的材料. 背景和原理. 化学发光是给予发光化合物一个外加的能量 , 使其电子由基态跃升到激发态 , 当电子由激发态返回基态时放射出荧光或磷光。发光的强度受温度高低的影响。. 操作步骤. 1. 取 3 个 500mL 烧杯 , 分别加入 300mL 的冰水和热水于第一和第三个烧杯中 , 第二个烧杯中不加水。 2. 取三支荧光棒并且轻轻地折断内部的薄玻璃管 , 分别置入上述三个烧杯中约 2- 3 分钟 , 观察三支荧光棒的发光强度。. 3. 从冰水和热水的烧杯中同时取出荧光棒 , 放置在第二烧杯中并且靠近于第二支荧光棒的两旁。观察并比较三支荧光棒的发光强度。

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会发光的材料

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  1. 会发光的材料

  2. 背景和原理 • 化学发光是给予发光化合物一个外加的能量,使其电子由基态跃升到激发态, 当电子由激发态返回基态时放射出荧光或磷光。发光的强度受温度高低的影响。

  3. 操作步骤 • 1.取3个500mL烧杯, 分别加入300mL的冰水和热水于第一和第三个烧杯中, 第二个烧杯中不加水。 • 2.取三支荧光棒并且轻轻地折断内部的薄玻璃管, 分别置入上述三个烧杯中约2- 3 分钟, 观察三支荧光棒的发光强度。

  4. 3.从冰水和热水的烧杯中同时取出荧光棒, 放置在第二烧杯中并且靠近于第二支荧光棒的两旁。观察并比较三支荧光棒的发光强度。 • 注: 若室内亮度太亮, 则放置在无光线之处以利于观察。

  5. 四、思考与探究 • 荧光棒的发光强度与温度有什么关系？

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