Question

when a Ray of light is passed through two prisms one upright and the other inverted no spectrum is formed instead a ray of white light is seen on the seen
give your reasons

Answer 1

HEY MATE!
IT IS DUE TO SPECIFIC SHAPE OF THE PRISM.
PLEASE MARK MY ANSWER AS A BRAINLIEST ANSWER.
THANK YOU.

Answer 2

The first prism on which the ray of light will disperse the light into its seven colours. When this dispersed light enters the second prism,all the seven components  of light re-unite and a ray of white light appears