According to our current understanding of physics, nothing can be accelerated to or beyond the speed of light. However, let's assume we suspend the laws of physics for the purpose of this hypothetical scenario.
If one of the wormhole entrances is accelerated to the speed of light while the other remains stationary, time dilation effects would come into play. Time dilation occurs when an object is moving relative to another object or reference frame.
In this case, the observer entering the stationary wormhole entrance would experience time passing normally, as they are not moving relative to the entrance.
On the other hand, the observer entering the accelerated wormhole entrance would experience time dilation due to their high velocity. From their perspective, time would pass more slowly compared to the observer in the stationary wormhole entrance.
As the velocity approaches the speed of light, time dilation becomes more pronounced. If we assume the accelerated wormhole entrance is somehow traveling at the speed of light, time would essentially stop for the observer entering that entrance. They would experience no passage of time until the velocity is reduced below the speed of light.
From the perspective of the stationary observer, they would see the observer entering the accelerated wormhole entrance frozen in time until their velocity decreases.
It's important to note that this hypothetical scenario assumes the existence and validity of wormholes, as well as the ability to accelerate objects to the speed of light, which currently go beyond our scientific knowledge and technological capabilities.