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The General Theory of Relativity proposes the
slowing of time near massive objects like
Black Holes. This occurrence in Relativity
creates another phenomena associated
with massive bodies in the universe.
Light and all other electromagnetic waves
have wavelengths that are associated
with them which define the properties of
the wave. This wavelength is related
to a frequency as well as the time period
of the wave. General relativity shows that
time runs at different rates depending on
the density of the space-time curvature,
this means the wavelength of a wave will
change as time changes near massive
bodies. As a wave propagates through
changing space-time curvature the wave itself
will change wavelength, and therefore
change properties. The wavelengths
of the visible spectrum range from 400 to 700
nanometers(violet to red light), as time
slows wavelengths decrease and as time speeds
up wavelengths are stretched. If light
propagates out away from a Black Hole time
speeds up and its wavelength is shifted
to the red end of the spectrum, the light
received far from the Black Hole is a different
color then when it started. This is called
Gravitational Redshift.

Redshift Program

These are two identical programs for calculating
Gravitational Redshift. The one uses a
graphics library only supported at Syracuse University
computer clusters, and the other is a boring
dos version which can be run anywhere.

Back to G.R.
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