Changes in distance are perpendicular to the direction

of travel of the wave.

Changes are balanced-- areas remain same.

Change in one direction is balanced by opposite change

in other direction.

Livingston detector as very intense gravity wave

goes by, as “seen” from the central control room.

Picture is of distances as measured from that center.

(Amplitude is 10,000,000,000,000,000,000 greater than

actually seen, and about 50 times slower than the actual signal).