Aresearcher in the rainforests of borneo measures relative humidity using a sling psychrometer. she sees the wet bulb temperature is about 0.5 °c lower than the dry bulb. this indicates that the air is a) close to 0% relative humidity b) close to 100% relative humidity c) close to 25% relative humidity d) close to 50% relative humidity

option B is correct

Explanation:

option B is correct

A Sling Psychrometer device is used to measure relative humidity and dew point temperature in an area. Now, whenever the difference between wet bulb and dry bulb temperature is less than one degree celsius the relative humidity tend to be close to 100%. hence the correct option of the question is B