Question

_________built the first practical reflecting telescope and developed a theory of colour. ​

Answer 1

Answer:

Newton also built the first practical reflecting telescope and developed a sophisticated theory of colour based on the observation that a prism decomposes white light into the colours of the visible spectrum. Newton's work on light was collected in his highly influential book Opticks, first published in 1704.

Answer 2

Newton Built The First Practical Reflecting Telescope And Developed A Theory Of Colour.