Let's not just take this sitting down!

In other words, let's challenge the things Thorne is telling us.

1. Our first thorne-y question comes from Katrina, who quite reasonably is not sold on the arguments presented in box 2.4 on page 102. Her point is, Suppose we drop the lower clock first. It certainly looks as though nothing much changes, except that now the lower clock is moving faster than the upper clock, and all the flashes it receives from the upper clock are red-shifted, not blue-shifted. So, doesn't this do just as good a job of telling us that it's the upper clock that's ticking more slowly?

2. Now for Andrew's question: If light accelerates under the influence of gravity, does this mean that a photon shot straight up from the surface of a non-spinning, isolated massive body slows down to a speed less than c?