The speed of light in a plastic material is 1.4 x 10^8. What is the index of refraction of the material?
index=3E8/1.4E8
To find the index of refraction of a material, you can use the formula:
Index of refraction (n) = Speed of light in vacuum / Speed of light in the material
Given that the speed of light in a plastic material is 1.4 x 10^8 m/s, and the speed of light in vacuum is approximately 3 x 10^8 m/s, we can substitute these values into the formula to find the index of refraction:
n = (3 x 10^8 m/s) / (1.4 x 10^8 m/s)
= 2.14
Therefore, the index of refraction of the plastic material is approximately 2.14.