Please explain In both cases, an aquarium is partially filled with water, and a
ID: 1608403 • Letter: P
Question
Please explain In both cases, an aquarium is partially filled with water, and a layer of oil is floating on top of the water. The two cases are identical except for the type of oil used. In Case A, a laser beam in the water totally reflects off of the oil/water boundary as shown. In Case B, the same laser beam refracts at the oil/water boundary as shown. (a) Is the index of refraction of the oil (i) greater in Case A, (ii) greater in Case B, or (III) the same in cases? _____ Explain your reasoning. (b) Is the speed of light in the oil (i) greater in Case A, (ii) greater in Case B, or (Hi) the same in both cases? _____ Explain your reasoning.Explanation / Answer
a) in case a internal reflection takes place because refractive index of water is greater than the oil refractive index
from snells law n1sintheta1 = n2sintheta2
n2/n1 is less than1
n2<n1 or n1>n2
answer is case B
b) refrractive index is inversly proportinally to the spped of light
answer is case A