The speed of light in vacuum is exactly 299,792,458 m/s. a beam of light has a wavelength of 651 nm in vacuum. this light propagates in a liquid whose index of refraction at this wavelength is 1.16. what is the speed of this light in the liquid? give an answer in 108 m/s. pay attention to the number of significant figures.

Explanation:

The index of refraction is equal to the speed of light c in vacuum divided by its speed v in a substance, or . For our case we want to use , which for our values is equal to:

Which we will express with 3 significant figures (since a product or quotient must contain the same number of significant figures as the measurement with the  least number of significant figures):