# Faster Than Light?

## Main Question or Discussion Point

Suppose you drop a ball alongside an exponential curve. On the other side of the ball is a continuous light source that is always shining perpendicular to the ball's path, such as in view 1.

As the ball drops, the edge of the balls shadow on the curve moves, while the curve is still vertical, at the speed of the ball, but as the shadow's edge moves further and further along the curve, it rapidly speeds up, as in view 2.

When the shadow's edge approaches the part of the curve that is horizontal, it's speed should approach infinity, as in view 3. However, can it?

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The Rev

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