"Aha" is an expression often used to convey a moment of realization or discovery. It typically occurs when someone suddenly understands a concept or finds a solution to a problem. This moment can be both surprising and enlightening, leading to a sense of clarity. In psychology, the "Aha" moment is associated with insight learning, where individuals make connections between ideas or experiences. This phenomenon can be linked to creativity and problem-solving, as it often leads to innovative solutions. Famous figures like Albert Einstein and Thomas Edison are known to have experienced such moments in their work.