A rectangular slab of glass with unknown index of refraction is on top of the surface of a liquid that also has an unknown index of refraction. A light beam is incident from air into the glass such that the part of the beam that strikes at the glass/liquid boundary is incident at the critical angle which is 65 degrees. The angle of incidence between the air/glass boundary is 40 degrees. Required:
a. Determine the index of refraction of the glass.
b. Determine the index of refraction of the liquid.

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

As the distance from a magnet increases, what happens to the magnet force?

People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in contact with their eyes. in a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina.with the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 2.05cm in front of the eye.)