Answer:
For two dimensions, you have length and width. For three dimensions, you have length, width, and depth.
Explanation:
1. Photographs are two dimensional because they have no depth or illusion of depth, only length and width.
2. The three dimensional scene before you allows your binocular eyes to change focus. You can focus clearly on things close up or far away. You can move to the side and see behind items. Photographs have a single focus, either close up, mid-range, or far away for example. You cannot move to the side and see around an item in a photograph.
3. Advantages of two-dimensional art-forms such as photographs include that as the artist, you can define what the focus of the image will be, and draw attention to that area. Regardless of whether the observer is right in front of the image or off to the side, the image appears pretty much the same.
4. Limitations of two-dimensional art forms such as photographs include that the subject is not as life-like as it would be as a three-dimensional object. The image of a mountain range for example, does not give much indication of depth. Photographic images can be ambiguous because the observer cannot move to the side and gain better perspective. They eye can be fooled by a photograph with respect to size and perspective.
