Spirit of Truth wrote:
"Randy Poe" wrote in message
ups.com...

Spirit of Truth wrote:
wrote in message
ps.com...
What is Circular motion ??
The direction of a body's motion is constantly changing when it
moves in a circle at a steady speed.

Does this then become an acceleration each moment to change the straight
line directional vector?

Yes.

Thanks! Then why such a hullaballoo made in the past over the concept
that light bends in a gravitational field?

Because Newtonian theory says gravity affects masses,
and light is massless.

Surely in the M-M experiment
the travelling back and forth light had to bend with the Earth in order for
it to appear that it was going in a straight line back and forth?

The M-M experiment has nothing to do with gravitational
bending of light. The earth doesn't have enough gravity to cause
a noticeable effect. The answer to your question is "no". The
light doesn't have to "bend with the earth to appear to be going
in a straight line back and forth".

By "bend with the earth" do you mean follow the curve
of the earth, so that it would be the same height above
the earth's surface everywhere? Light doesn't do that.

- Randy