1. When the object is seen in a bright light.
2. When the color of the object contrasts sharply with the color of the background.
3. When looking over water, snow, or a uniform surface like a wheat field.
4. When looking from a height downward.
5. In clear atmosphere of high" altitudes, as in Arizona and New Mexico.
Objects seem more distant than they actually are:
1. When looking over a depression in the ground (across a canyon).
2. When there is a poor light (very cloudy day) or a fog.
3. When only a part of the object can be seen.
4. When looking from low ground upward toward higher ground.