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.)
Dew Point and Grains Calculations INSTRUCTIONS To find the Dew Point and Specific Hu-midity (grains per pound of air) for a given temperature and relative humidity, follow the 3 step procedure.Example: 80Â°F. and 60% RH Size: Six-inch diameter Part No. 4024392 STEP 3 Read the Specific Humidity in the Grains window.