(b) When the color of the object contrasts sharply with the color of the background.
(c) When looking over water, snow, or a uniform surface like a wheat field.
(d) When looking from a height downward.
(e) In the clear atmosphere of high altitudes.
Objects seem more distant—
(a) When looking over a depression in the ground.
(b) When there is a poor light or a fog.
(c) When only a small part of the object can be seen.
(d) When looking from low ground upward toward higher ground.
[1397]. Effect of heat and cold. Heat causes shots to strike high, and cold causes them to strike low.