An aquarium contains a 5-cm layer of water (n = 1.33) floating on top of carbon disulfide (n = 1.628). If the angle of incidence into the water from the air is 30°, what is the angle of refraction into the carbon disulfide?

A block of glass has an index of refraction equal to n_g=1.68. The glass is surrounded by oil which has an index of refraction of n_o=1.28. What is the largest incident angle (deg) possible in the glass before the ray undergoes total internal reflection?

A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. The angle of incidence is 62.8 degrees, and the angle of refraction is 62.0 degrees. What is the index of refraction of the unknown liquid?

An object is placed 10.1 cm in front of the cornea. (The cornea is thin ans has approximately parallel sides so that the reflection that occurs as light travels from air to cornea to aqueous humor is essentially the same as though the aqueous humor were directly in contact with the air. The aqueous humor has index of refraction n = 1.34 and the radius of curvature of cornea is 7.8 mm.) (a) What is the image distance for the image formed by the cornea alone? (b) The image formed by the cornea serves as an object for the lens. Treat the lens as a thin lens 8 mm behind the cornea. Find the optical power of the lens necessary to form an image on the retina, 25 mm from the center of the lens.