Fish

I was looking at fish in the water swimming by my feet when I tried to grab one out of the water. I thought that I was on path to grab the fish when in reality the light was refracting and my hand missed the fish. The index of refraction of the water is much greater than the index of air. Therefore light travels slower in water than in air. The frequency of the light is constant in both mediums.

The angles can be calculated using the formula nsin(x)=nsin(x)where n=the index of refraction.