started with a happy thought
in the head of a patent clerk -
if i fall freely i shan't feel my weight -
and would you believe the path it set.
First came the principle of equivalence
claiming that a frame of reference
moving with acceleration
is but akin to the field of gravitation.
So far so good all easy all merry
but the next in the chain be profound very -
what baffled Newton and forced him to deity
was thought by one to be the physics of geometry
known was the time to be like the space
not 'space' and 'time' but 'space-time' in place
and to imagine that it curves, is a solid feat
but it had to be shown by the mathematics
years were spent by a genius brain
the intricacies that differential geometry ordained
but then came out in all its glory
almost a decade for the whole theory
gravity be but nothing more than
a curvature in the space-time span
every single energy-momentum density
does the curving without impunity
the larger ball sinks deeper on a rubber sheet
makes tiny marbles revolve around it
sun and moon and you and me
are just like that - hail gravity !
