Question

Albert views Henry moving by at a constant velocity. Henry has a light clock and also a stopwatch which were synchronized when at rest. As Albert views these two moving clocks, which of these statements would be true according to Albert? The light clock runs slow compared to the stopwatch. The stopwatch runs slow compared to the light clock. The two are still synchronized but run fast. The two are still synchronized but run slow.

Answer 1

The two are still synchronized, but both are running slow.

(So is Henry's heartbeat, breathing rate, and all the frequencies in the hip-hop .mp3 he's listening to.)