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.)
Relative humidity gives the ratio of how much moisture the air is holding to how much moisture it could hold at a given temperature. This can be expressed in terms of vapor pressure and saturation vapor pressure: RH = 100% x (E/Es). where, according to an approximation of the Clausius-Clapeyron equation:nd T is temperature (in Kelvin), and Td is dew point temperature (also in Kelvin). So, if you know the temperature, you can solve for Es, and substitute the equation for E into the expression for relative humidity and solve for Td (dew point).