探秘：荧光笔为何能发光？ 在日常生活和学习中，荧光笔是一种常见的书写和标记工具。它的独特之处在于其能够在黑暗或光线较弱的环境中发出明亮的荧光，引起人们的注意。那么，荧光笔为何能发光呢？接下来，让我们一起来探秘荧光笔的发光原理。

【荧光笔】双头荧光笔6色粗细两头双色莹光标记笔学生用红色橙色黄色蓝色绿色紫色彩色做笔记划重点专用记号银光笔售价：3.86元 领券价：2.5元 邮费：0.00

一、荧光笔的组成 要了解荧光笔的发光原理，首先需要了解它的组成部分。荧光笔主要由笔杆、笔芯和墨水三部分组成。其中，墨水是荧光笔发光的关键。这种墨水通常含有荧光剂，是一种特殊的化学物质。 二、荧光剂的发光原理 荧光剂是使荧光笔发光的核心物质。当荧光剂受到光线的照射时，它会吸收光能，然后以较低的能量形式释放出来，这种能量形式就是我们所看到的荧光。具体来说，荧光剂内部的电子在受到激发后，会跃迁到高能级状态。当电子从高能级状态返回到低能级状态时，就会发出荧光。 三、荧光笔的发光过程 当我们在使用荧光笔时，笔芯中的墨水与纸张接触，墨水中的荧光剂开始发挥作用。由于我们日常的光源（如太阳光、灯光等）照射到荧光剂上，荧光剂吸收光能后开始发光。这种发光过程是物理过程，不涉及化学反应，因此荧光笔的发光过程是可逆的。 四、翻译成英文 Exploring the Mystery: Why Can a Fluorescent Pen Emit Light? In daily life and study, a fluorescent pen is a common writing and marking tool. Its uniqueness lies in its ability to emit bright fluorescence in dark or low-light environments, catching people's attention. So, why can a fluorescent pen emit light? Let's explore the principle behind it. I. Composition of a Fluorescent Pen To understand the light-emitting principle of a fluorescent pen, we need to know its components. A fluorescent pen is mainly composed of a pen barrel, a pen refill, and ink. Among them, the ink is the key to the light-emitting function of the pen. This ink usually contains a fluorescent agent, a special chemical substance.

II. Light-Emitting Principle of Fluorescent Agent

【荧光笔】荧光笔荧光标记笔小学生专用划重点初中生用双头彩色记号笔作业记笔记淡色系绘画涂鸦笔莹光彩色笔售价：2.73元 领券价：2.73元 邮费：0.00

【荧光笔】叠色双头荧光笔大容量小学生初高中生用彩色标记笔划重点记号笔售价：19.80元 领券价：19.8元 邮费：0.00

The fluorescent agent is the core substance that makes a fluorescent pen emit light. When the fluorescent agent is exposed to light, it absorbs the light energy and then releases it in a lower energy form, which we perceive as fluorescence. Specifically, when the electrons within the fluorescent agent are excited, they jump to a higher energy level. When the electrons return to a lower energy level, they emit light, which we observe as fluorescence. III. The Light-Emitting Process of a Fluorescent Pen When we use a fluorescent pen, the ink in the refill contacts the paper and the fluorescent agent in the ink starts to work. Due to the daily light source (such as sunlight, lamp light, etc.) shining on the fluorescent agent, the fluorescent agent starts to emit light after absorbing the light energy. This light-emitting process is a physical process without involving chemical reactions. Therefore, the light-emitting process of a fluorescent pen is reversible. 总的来说，荧光笔之所以能发光，是因为其墨水中含有能够吸收光线并发出荧光的特殊化学物质——荧光剂。当我们用荧光笔书写或标记时，由于光源的照射，荧光剂开始发挥作用并发出明亮的荧光。