Hikari, meaning "light" in Japanese, is a fundamental concept in various cultures and philosophies. It often symbolizes purity, hope, and enlightenment. In many spiritual traditions, light represents knowledge and truth, guiding individuals on their paths. In the context of science, light refers to electromagnetic radiation that is visible to the human eye. It plays a crucial role in processes like photosynthesis in plants and is essential for vision. The study of light encompasses various fields, including physics and optics, and has led to numerous technological advancements, such as lasers and fiber optics.