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2025-06-18 07:00:35 -

What is a laser pen and how does it work
A laser pen, also commonly referred to as a laser pointer, is a small handheld device that emits a focused beam of visible light, usually in red, green, or blue colors. It is called a "pen" because of its slim, pen-like shape, and is often used in presentations, astronomy, construction, education, and even entertainment. While it might look like a simple tool, the science behind a laser pen is...

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