sci.energy

dear friends,

as you may be aware, the absorption and transmission of light by
various materials leads to the ability to analyse secondary signals
with spectroscopes giving us an understanding of their constituent
elements.

spectroscopic analysis has been used to determine the constituent
nature of the sun and stars and now even atmospheric anaylsis of
extrasolar planets.

would it not be possible to modulate the frequency range of the
received signal from secondary light as it emerges from planetary
cores and thereby determine the density, mass and volume as well as
the constituent makeup of the planetary cores?

furthermore, would the same technique not also be valid on earth to
analyse the constituent makeup of the earth's crust and thereby
discover mineral and oil deposits? perhaps a technique of active
uptake of reflected secondary radiation would be preferable to using
secondary solar energy?

all positive thoughts would be welcome.