The Lydian scale is a seven-note musical scale that is characterized by its bright and uplifting sound. It is the fourth mode of the major scale, meaning it is derived from the major scale by starting on its fourth degree. The Lydian scale can be represented by the following sequence of intervals: whole, whole, whole, half, whole, whole, half. In terms of its structure, the Lydian scale features a raised fourth degree compared to the major scale, which contributes to its unique sound. This scale is often used in various genres of music, including jazz and rock, to create a sense of tension and resolution.