last physics post

The future solution to generate electricity may lie in nuclear fusion. Right now nuclear plants use fission where large atoms are broken down into smaller elements and a mass defect. It occurs in a chain reaction where a neutron collides with the nucleus of an atom causing it to separate. The mass defect is translated into energy by the equation E=mc^2.
Fusion, on the other hand, is the combination of small elements into larger elements. Rather than using a rare uranium element, fusion requires isotopes of hydrogen. Since hydrogen is much more common, fusion can almost be considered a renewable energy source.

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.