what is light? Give its examples
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Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is the visible spectrum that is visible to the human eye and is responsible for the sense of sight.
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- Anything that produces light, whether natural and artificial, is referred to as a light source. The Sun and stars are both natural light sources. Lampposts and televisions are both artificial light sources.
- We couldn't perceive the world around us without light sources, yet not every item we see is a source of light. Many items only reflect light from a source of illumination.
- Before using light to explore the Universe, students need learn about where light comes from, how it travels, and how it may be used.
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