Question

who was the first person who use glass prism?

Answer 1

Isaac Newton was the first person to use a glass prism .

Answer 2

It was Isaac Newton who first thought that prisms split colours out of colourless light. Newton placed a second prism such that a separated colour would pass through it and found the colour unchanged. He concluded that prisms separate colours. He also used a lens and a second prism to recompose the rainbow into white light.
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