On May 14, 3:38 pm, firstname.lastname@example.org wrote:
Actually, Einstein's theory of gravity bending the path of
light rays to a detached observer was proven by seeing the
"jump" of the light from a distant star as it passed near
our sun during an eclipse. The position of the star shifted
abruptly as the light ray followed the bend space coordinates
caused by the sun's gravitational field...... then shifted back
abruptly as the path moved away from the sun. Hence,
the light to a distance observer appeared 'bent".....
On May 15, 6:14 pm, email@example.com wrote:
Ok... Gravity bent space, and space bent the light path.....
On the other hand, we all know that heat rising makes the path
of light waver, as happens when watching a distant object in
the desert or over hot pavement...
Perhaps gravity doesn't actually "bend" space, and it was the hot
air from the sun that made the star jump...... Pehaps Einstein
On Tuesday, May 14, 2013 4:38:54 PM UTC-4, firstname.lastname@example.org wrote:
Gravity isn't going to bend light or space over the range of a typical
However heat will. Warm air will definitely refract a laser beam enough to
throw your measurements off. It's the reason a laser can't be trusted to get
tunnels from each end to meet in the middle.
Surfaces can release heat and will bend beams by refraction. I have not
found a use for a ruler laser, but I do have a self leveling laser from HF.
I use it in low light. I've measured beam sag, and I built my elevated deck
using that laser. I did try the water hose. It worked ok. Seemed like more
work when looking at multiple points at the same time. I also use the dual
beam HF laser to set angles and dimensions on basement upgrade.
That would have worked in the 20th century or before. But in the 21st
century you would be arrested because a mouse, fly, or bird got killed
from the gunshot. And the shooter would be charged for being a
terrorist, and would have to face the FBI CIA and Dept of Homeland
Security. They would search the entire construction site for bombs, and
other weapons and explosives. Then a team of psychiatrists would have
to evaluate the shooter, and 20 years of mental health care would be
required after the prison term. In the meantime, all schools, shopping
malls and gas stations within 200 miles would be placed on lockdown for
several weeks. Then the NRA would write a lengthy article boasting
their presence and state that guns should be used for all construction
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