Hey, I'm doing a assignment for school and the question is "does the density of a liquid affect refraction"

 

Im using a glass jar with various liquids and a laser point as the light although no matter what liquid i use the light stays straight all the way thru and out the otherside.

Am i doing something wrong or does the density not affect refraction

You can't shine it through the center. The light can't be perpendicular to the surface. What does snell's law of refraction tell you?

 

If you can find a container with flat sides (like a square) it might be easier, since then the location of the light hitting the container doesn't affect the angle, as long as you don't rotate the container.