Suppose two light sources are engulfed in darkness and separated by 100 feet are directed at each other and switched on at the same time.?

At what speed does the darkness between the light sources disappear at from the time the light sources are switched on and the time the light intensity between the two sources reaches it's steady state?

2017-09-26T04:03:21Z

Corrected time duration. Between the time switched on and the time the light sources meet at 50 feet.

Andrew Smith2017-09-23T04:32:35Z

As measured by WHOM?
If you had an observer magically moving on light beam A then it would see light beam B approaching at speed "c".
If you had an observer magically moving on light beam B then it would see light beam A approaching at speed "c"
If you have an observer in between it would see EACH beam moving at speed "c"

The intent of the question was to try to prove a paradox that one is moving relative to the other at "2c"
which is not happening.

10

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