A laser pointer is a small handheld device that emits a narrow beam of light, typically in the visible spectrum. It is commonly used in presentations, classrooms, and meetings to highlight specific points on a screen or surface. The light produced is usually red or green, with green lasers being more visible in bright environments. Laser pointers work by using a laser diode to generate light, which is then focused into a beam. They are powered by batteries and can vary in strength and range. While they are useful tools, it is important to use them responsibly to avoid shining the beam into people's eyes or at reflective surfaces.