Question

What is spectrum ? Why do we get a spectrum of seven colours when white light is dispersed by a prism ?​

Answer 1

Explanation:

the spectrum is discovered by Isaak Newton a great scientist who lived in 17th century

was the first to show that ordinary 'white' light is made up of seven colours - violet,indigo,blue ,green,yellow,orange and red ( in the order of VIBGYOR ) . the pattern formed called spectrum.