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FASTER THAN C
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1.ROTATING LAMP
A rotating lamp sends in the space a rotating ray. For a given rotation speed 
a sufficiently distant point of the ray moves faster than c.

2.BEACHCOMBER's ROPE
A beachcomber, for some doubtless good reason, has stretched a rope intended 
to be parallel to the low tide line. However, lacking precise tools, he made 
it nearly parallel, so that with the coming flood the point at which surf 
waves were hitting the rope traveled along the rope with a very high speed. 

Theoretically one can imagine an angle small enough for the impact point to 
travel along the rope faster than c.

Now, the beachcomber, no matter how competent, will not be able to carry out 
the experiment with enough precision.

But if we replace the surf with a light wave and the rope with a glass surface, 
any angle between 0 and 90 degrees will be good enough for the impact point 
to travel faster than c.

NOTE: This issue is not a puzzle, but an exercise in Special Relativity in its
original Einstein's version. Thus, it should be considered from within the SR
and only with help of SR's Axioms, Definitions and Theorems.

Awaiting comments.

HINT: 
Have a look at  STRUCTURE OF SCIENTIFIC THEORY 
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