what is the difference between wet bulb temperature and dew point?

Question

arent they both where relative humidity = 100%?

wet bulb keep adding moisture to the air until no more will go in (100%)
dew point is something colder than this (by a fraction) so that the water starts coming out of the air as condensation

Answer 1

the wet bulb is the dew point at 100 %. For Humidities other than 100% ,wet bulb and dew point temps are different. See link to Psychrometric chart.. The temp difference is more than a fraction. Wet Bulb temp is a means of detecting how saturated the air is. The larger the difference between wet & Dry bulb temp the dryer the air.

The dew point is the temp at which you must cool the current sample of air so that the partial pressure of water vapor contained in the sample equals the saturation pressure.

The dew point and wet bulb temps are read off of the same scale on the charl. However notice the wet bulb temp (68) follows the angled lines toward the state point where it intersects with the dry bulb temp (80) verticle line. From the state point the horizontal line is followed to the left where the dew point is 60

Answer 2

Dew Point Vs Wet Bulb

Answer 3

dew point temperature dry bulb temperature wet bulb temperature atmospheric air