Alice and the looking-glass
Alice faces a looking glass (mirror) and is standing at a level so that her eyes appear to her to be right at the top of the mirror as shown in the figure. At the position she is standing, she can just see her belt buckle at the bottom of the mirror. If she steps back far enough
Put the letter of the choice that completes the sentence correctly in the box at the right below and explain why you think so with a few sentences and some rays on the diagram.
- she will be eventually able to see all of herself in the mirror at the same time.
- she will see no change in how much of herself she can see.
- she will see less of herself as she steps back.
- some other result (explain)
Note to the instructor: This is another surprise for many students. A large majority think you can see more of yourself by stepping back. What experiences do you suppose led them to that conclusion?
Not finding what you wanted? Check the
Map for more information.
Page last modified
October 31, 2002: OP19