Under which of the following circumstances can the relative humidity exceed 100 percent without producing fog?
A)There are no condensation nuclei present.
B)The dew point is higher than the air temperature.
C)The air is perfectly dry.
D)There are too many electrically charged ions in the air.

Question

Quizplus · Accepted Answer

Relative humidity can exceed 100 percent without producing fog if there are no condensation nuclei present. Condensation nuclei are tiny particles in the air upon which water vapor can condense to form fog or clouds. Without these particles, even if the relative humidity exceeds 100%, fog cannot form because the water vapor has nothing to condense on.

Under Which of the Following Circumstances Can the Relative Humidity