Diamond has a refractive index of 2.42. How fast would a light ray travel through a diamond?

You turn on one laser in air and shine a second laser through a glass block. How much farther does the light travel in air compared to light traveling in the glass over a period of 2 nanoseconds?

Ramon has contact lenses with the prescription +2.0 D. What eye condition does Ramon have?

Microwaves with a frequency of 10.5 GHz are aimed downward into a flat-bottomed beaker that contains sunflower oil. A microwave detector above the beaker finds that there are strong reflections when the oil depth is 2.76 cm and 3.68 cm but at no depths in between. What is the index of refraction of sunflower oil at microwave frequencies?

What is the minimum possible value for the index of refraction $n$ of a material?

In optics, what does the symbol $n$ typically represent?

Which of the following best describes the relationship between the index of refraction $n$ and the speed of light in a material $v$?

If a light ray passes from medium $1$ into medium $2$ and bends toward the normal, what can we say about the relative sizes of the indices of refraction of these media?