can someone please explain how to work out q 2a(ii) in O/N 2008 31
it's simple
the eyepiece gratiule is not callibrated but is jus marked with equal gaps
but the stage micrometer is callibrated according to the magnifiaction,
in the first blank write the number of eyepiece graticule units and the ans would be near 8.0
then for the 2nd and 3rd blank look at fig 2.3, look at the fifth division from zero on the figure circle and the 4.5 in the smaller scale, they both exactly superimpose
and so
as the fig say that Each division on the stage micrometer
scale is 0.1 mm so te size of one unit on eye piece grativule would be 4.5/5 *0.1mm
you have lumen of eightof 8 unit of eyepiece graticule unit so multiple egiht with 4.5/5*0.1
u get ur ans in mm
