1. The problem statement, all variables and given/known data Plot a graph of sinθ versus sinθ' where θ is the incident ray and θ' is the refracted ray and use the graph to determine the index of refraction of distilled water, the medium through which the incident ray passes. Draw the graph without including the origin as a data point. Comment on why the graph does not go through the origin. Use incident rays of 0, 10, 20, 30, 40, 50 and 60°. 2. The attempt at a solution With respect to an acrylic medium that has an incident light ray approaching at 0°, the refracted light ray is also 0°. I don't understand why this would also not be the case for water. Is this difference due to the incident ray passing through the medium of the container holding the distilled water, then through the water, then through the medium again?