UNDERSTANDING THE UNIVERSE - yash pal

What is the circumference of earth? How was it measured? Imagine that you are located at a point on earth where at some time of the day the length of the shadow cast by a vertical pole is zero. You also have a friend located some 500 kilometers due north of you monitoring the length of the shadow of a vertical pole of the same height. If you ask your friend over the telephone to measure …

…together in the same direction, the tides are higher. This happens during the full moon and the new moon. In between these times the moon and the sun do not work in unison. Indeed, one might say the sun even acts as a spoil-sport in restricting the flow of waters to or from the lunar bulge; the tides are not, therefore, so spectacular. Brar Di Pasand. Religion Page. 02 November 2003 <http://www.brardipasand.com>.