Atank holds a 1.44-m thick layer of oil that floats on a 0.98-m thick layer of brine. both liquids are clear and do not intermix. point o is at the bottom of the tank, on a vertical axis. the indices of refraction of the oil and the brine are 1.40 and 1.52, respectively. a ray originating at o crosses the brine-oil interface at a point 0.7 m from the axis. the ray continues and emerges into the air above the oil. what is the angle that the ray in the air makes with the vertical axis

Angle of ray makes with the vertical is 62.1 degree

Explanation:

As per the ray diagram we know that the angle of incidence on oil brine interface will be given as

now by Snell'a law at that interface we have

now we will have

now this is the angle of incidence for oil air interface

so now again by Snell's law we will have

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.