What is the meaning of accidental line in art?

What type of battery is compatible with a 35mm camera? What is a flat illustration? What is Rene Magritte's painting The Blank Check about? How can I successfully take film through TSA security checkpoints? What are colors of the rainbow red orange yellow green blue indigo violet? What do you get when you mix blue and purple? How can I scan film negatives to digitize them for preservation and sharing? What color does brown and mint green make? What are the key differences between the AV and TV canon, and how do they impact the overall understanding and interpretation of the subject matter? What is the relationship between pincushion distortion and barrel distortion, and how do they differ from each other? What are some key techniques for capturing the essence of people in black and white fine art photography? What is the significance of depth of field in point and shoot photography? What colour is joan jett's eyes? What color do you get when you mix pink blue and purple? Do tripods fit all cameras, or are there specific types of cameras that require a certain type of tripod? What was Escher last painting called and when did he do it? What are the benefits of using a pttl flash in photography? What goes with hot pink and teal? What is the optimal f stop setting to achieve a shallow depth of field in photography? How can I enhance the quality of images by sharpening them in Photoshop CS6?