The speed of light in a vacuum is 974 million feet
per second.
Electricity in copper travels at about 94% of the speed of
light in a vacuum.
Therefore, the signal travels at 916 million feet per
second in the cable.
Therefore, the difference in timing for a 4 foot difference
in cable length is about 4 nanoseconds[ billionths of a second ].
An easy rule of thumb is to remember that light travels
about 1 foot per nanosecond.
Dr. Gregory Greenman
Physicist
per second.
Electricity in copper travels at about 94% of the speed of
light in a vacuum.
Therefore, the signal travels at 916 million feet per
second in the cable.
Therefore, the difference in timing for a 4 foot difference
in cable length is about 4 nanoseconds[ billionths of a second ].
An easy rule of thumb is to remember that light travels
about 1 foot per nanosecond.
Dr. Gregory Greenman
Physicist