In this passage, the character is attempting to imagine what the flame of a candle looks like once it is extinguished because she has never seen it herself. Her curiosity reflects a desire to visualize something beyond her direct experience, highlighting her imaginative nature and the wonder she experiences in her curious world.
Lewis Carroll captures this moment to showcase the character’s whimsical thinking, as she struggles to picture a concept she has not encountered. The quote illustrates the imaginative and playful tone of the story, encouraging readers to think creatively about everyday phenomena they might normally take for granted.