Answer:
The scientist who used a prism to study light was Isaac Newton.
Step-by-step explanation:
Newton was the first to understand what the rainbow was: he refracted the white light with a prism and decomposed it into basic colors: red, orange, yellow, green, blue and violet.
For his experiments, Newton used triangular glass prisms. The light penetrates one of the faces of the prism and is refracted to decompose in different colors, because the degree of separation varies depending on the wavelength of each color. The prisms act in this way thanks to the fact that the light changes speed when it passes from the air to the crystal of the prism.
Once the colors were separated, Newton used a second prism to refract them and to form white light again. The experiment showed that the prism did not add color to light, as many believed. Newton also passed only the red color obtained with a prism for a second prism, thus discovering that the color was not altered. It was further proof that the prism did not create colors, but only separated those that were present in the original beam of light.
In large part it can be said that our current conception of light and color born with Isaac Newton and his valuable contribution to the subject.