Question

9. speed of light of all colours is same in _____ but differs when light passes through _____.​

Answer 1

Answer:

vacuum or free space

prism

Explanation:

Answer 2

Answer:

Vacuum, Prism

Explanation:

speed of light doesn't change in vaccum as it is nearly same as speed of light of all colours.

When light from atmosphere passes through prism, it gathers and a spectrum of VIBGYOR is seen

Hope the answer satisfied you!