Sferische spiegels

Explore image location and size for both concave and convex mirrors.[br][br]You can drag the point called object to change the location (drag horizontally) and height (drag vertically) of the object.
What phenomenon does the failure of all 3 lines to cross neatly at a single point demonstrate?[br]When is the image right side up?[br]When is the image real?[br]When is the image larger than the object?[br]What does moving the object point through the mirror correspond to physically? How does this connect to the sign conventions for mirrors?

Information: Sferische spiegels