When you fall a sleep and then wake up it feels like one second?

When you fall asleep, your brain enters a state of reduced consciousness, often making the passage of time feel distorted. This phenomenon occurs because the brain doesn't register time in the same way when you're asleep. As a result, waking up can feel instantaneous, as if no time has passed at all, especially if you wake up during a lighter sleep stage. This subjective experience is common and reflects the differences in how our brains process time while awake versus asleep.