33. Geometric Optics

What does the $n$ (index of refraction) directly measure?

Why is the index of refraction $n$ of a material always greater than or equal to $1$?

As the $n$ (index of refraction) of a material increases, how does the speed of light in that material change?

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

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?

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

If the speed of red light with wavelength $450nm$ in a material is $2.00\times 108^{\mathrm{}}m/s$, what is the index of refraction of the material?

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

Which of the following statements correctly describes the index of refraction of a material?

If the index of refraction of a material is $2$, this means that light travels in that material at what fraction of its speed in a vacuum?

Which of the following statements about the refractive index of a medium is correct?

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?