Question

Plz solve this completely​

Answer 1

Answer:

1.5×10^8 m/s

Explanation:

Refractive index of a medium=speed of light in vaccum/speed of light in a medium.

2×10^8=3×10^8/speed of light in medium.

speed of light in the medium=3×10^8/2×10^8=1.5×10^8 m/s