When light from the sun strikes the surface of the earth, this light is absorbed by the ground. the ground, in turn, emits infrared light—which is actually invisible to human eyes—back into the air. what is the effect of this infrared light being released into the air from the ground? a. it makes the air brighter. b. it warms the air. c. it harms the ozone layer. d. it makes the air appear blue.

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.