## Conceptual Physics (12th Edition)

The path of a photon bends downward just as the path of a thrown baseball does, by the same distance in the same time interval. However, light travels so fast (roughly a foot per nanosecond) that in crossing a 10-meter wide room, taking a time of $t = 3.3 \times 10^{-8} s$, it would only drop about $5.4 \times 10^{-15} m$, roughly a thousandth the size of an atom.