Re: How long does sunlight take to reach the earth?

zarmewa@xxxxxxxxx wrote:
As light from the Sun takes 8.4 minutes to travel 1.93 millions miles
to Earth. But
Now gravitational time dilation is the effect of time passing at
different rates in regions of different gravitational potential which
was tested/ confirmed with difference of nanosecond recorded by atomic
clocks at different altitudes.
Sun gravity decreases as we move away from it and so time dilate.
Similarly earth's gravity has also affect its speed when it enter into
earth?s gravity medium. This means that speed = (distance/time (s=vt))
of light is not constant because of the time differences or time
dilation.
Similarly,
Second is currently defined as
http://en.wikipedia.org/wiki/Second#Inte...
the duration of 9 19 631 770 periods of the radiation corresponding to
the transition between the two hype levels of the ground state of
caesium 133 atom.
This definition refer to the caesium atom at rest at a temp of 0
K(absolute zero). The ground state is defined at zero magnetic field.
The second thus defined is equivalent to the ephemeies second which
was based on astronomical measurements.

From the above discussion, time dilation, the high magnetic filed and
temperature of sun should effect the length (duration) of time as one
move away from sun ?
If yes, then how long does sunlight take to reach the earth?
And how speed of light is affected when it enter from sun?s gravity
medium into earth?s gravity medium?

Further, acceleration is the rate of change of instantaneous speed.
This means that light from sun changes or reduces its speed at every
gravitational potential due to time dilation and should decelerating
till it diminish. While E=mc^2 , C^2 (Speed which I think should not
be constant) was used in the equation instead of deceleration.
Similarly I don?t understand how astronauts on the moon were
communicating to their colleagues on earth due to time dilation.

Note: Time on moon is depend upon its position wrt the sun and earth
in its orbits. As time depend upon gravity therefore time on moon
should be either past or future wrt earth.

This means that we can go in past or future if we travel at speed of
light. Is it possible?

No,
The clock simply malfunctioned, time did not change rate at all.
In fact the most important function of a clock is to not change
rate so when a clock changes rate at all is has malfunctioned.
No time travel, Unless you can start moving planets backwards
or forwards faster than they move now and make all the flowers
and tree and bugs and all sorts of growing things reverse growth
or all grow faster at once etc...
In short.
"time dilation as in time changing rate is complete bull***.

--
James M Driscoll Jr
Discoverer of the Clock Malfunction Fact.
Spaceman

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