The Inverse Square Law

        I was so tired from all that work that I just laid down for a little while and relaxed. Then I went for an early evening walk and listened to a questions and answers astrophysics lecture. One question I thought interesting was about the force of magnetism. Why is it that the Earth’s magnetic field can be over whelmed by small refrigerator magnets? The answer was that the magnetic force loses its power because of the inverse square law- it loses it strength inversely proportional to the square of the distance to the source. Therefore, you can take a small magnet and place it next to a compass, which over powers the Earth’s magnetic field. Then draw the small magnet away by several feet- it no longer affects the compass and the Earth’s magnetic field takes back over because it’s so prevailing- 4000 miles beneath our feet and still extends way out into the upper atmosphere and into space to reflect high-energy particles emitted from the Sun solar wind causing auroras and protecting life.