What is the natural phenomenon behind the formation of a rainbow?b)Name a device that can be used to observe such a phenomenon in the laboratory?c)If you are facing a rainbow in the sky, what is the position of sun with respect to your

position?

a)the natural phenomenon behind it isDISPERSION, INTERNAL REFLECTION ANDREFRATION

b)we can use PRISM to see a rainbow

c)if we want to see arainbow(1) we must face opposite to thesun in a recently showered area

(2)in sunny day,we can see rainbow near a waterfalll or a fountain

hope it would hep...and BEST OF LUCK FOR THE EXMAS....:0..:)