Why and when does the ghost disappear in hamlet act 1?

In Act 1 of "Hamlet," the ghost of King Hamlet disappears after revealing his death's true nature to Prince Hamlet and urging him to seek revenge against Claudius. The ghost vanishes at dawn, symbolizing the transition from the supernatural to the natural world, and it signifies the urgency of Hamlet's quest for vengeance. This disappearance also raises questions about the nature of the ghost and the implications of its visit.