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Fav十万个为什么
为什么荧光棒掰断才会发光？
荧光棒掰断才会发光主要是因为内部化学物质分离存放、掰断后化学反应发生、以及能量传递给荧光染料。
1、内部化学物质分离存放。荧光棒内部包含过氧化氢溶液和草酸二苯酯等化学物质，这些物质在未掰断前被分隔存放，不会发生反应。
2、掰断后化学反应发生。当荧光棒被掰断时，内部的玻璃管破裂，过氧化氢溶液与草酸二苯酯混合，发生化学反应，释放能量。
3、能量传递给荧光染料。化学反应释放的能量被传递给荧光染料，荧光染料分子吸收能量后从基态跃迁到激发态，再退激发时释放光子，从而发出荧光。
总结：荧光棒掰断才会发光，是因为内部化学物质分离存放、掰断后化学反应发生以及能量传递给荧光染料。
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