Answer:
The two are still synchronized but run slow
Explanation:
Time flows at a different rate for an object that is moving. The time of the object which is moving is running slower than an object which is stationary. Here, Albert is stationary so time will flow faster for him and for Henry who is moving time will flow slower. This phenomenon is called time dilation
[tex]\Delta t'=\frac{\Delta t}{\sqrt{1-\frac{v^2}{c^2}}}[/tex]
Where,
Δt is the time elapsed for the person who is moving
Δt' is the time elapsed for the person who is stationary
c = Speed of light = 3×10⁸ m/s
v = Velocity of the object which is moving