How are whole notes visually represented in music notation?

In music notation, whole notes are visually represented as an open note head without a stem. This distinctive appearance makes it easy to identify whole notes among other note values. The open note head signifies that it is held for a longer duration compared to notes with filled note heads, which represent shorter note values. Understanding the visual representation of whole notes is essential for reading music accurately, as it allows musicians to interpret the rhythm and duration of the notes in a piece. The simplicity of the open note head contributes to its role in conveying the concept of a whole note effectively.