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Early concepts of light included the idea that it traveled in straight lines and was emitted from a source. Some ancient Greek philosophers, like Euclid and Aristotle, also believed that light was a form of energy. Later, in the 17th century, Sir Isaac Newton proposed that light consisted of particles.
It was Sir Isaac Newton who played a key role in understanding light. He conducted experiments with prisms which led to the discovery that white light is made up of different colors.
Thomas Edison is credited with inventing the first practical light bulb. While Edison is often associated with the invention, it is important to note that the creation of the light bulb was the result of incremental improvements on earlier designs by other inventors.
Thomas Edison is credited with inventing the first practical light bulb in 1879. While there were others who contributed to the development of electric lighting, Edison's version was the first to be widely distributed and commercially successful.