Best Answer: Coarse adjustment is used to focus the image on the microscope under low or medium power by using larger motions of the lens. Fine adjustment is used to focus the image on the microscope of only high power by using very tiny motions of the lens.
If you are interested in a simpler calculation that gives an approximation of dew point temperature if you know the observed temperature and relative humidity, the following formula was proposed in a 2005 article by Mark G. Lawrence in the Bulletin of the American Meteorological Society: Td = T - ((100 - RH)/5.)
As the air temperature increases, with no addition of water vapor to the air, the dew point will: (1) stay equal to the relative humidity (2) stay equal to the air temperature (3) decrease (4) increase (5) remain the same. 5 The dew point will remain the same.