Which terms explains why you should only have to move the fine adjustment knob a little in order to bring your specimen into focus when you move to a higher power objective (if you had it in focus at the lower power objective)?

Iassume the answer is 75 feet. inwards to outwards rather than outwards to inwards. probably be 75.hachures are stokes drawn in direction of the steepest slope. a series of short parallel lines drawn on a map to indicate topographic relief. it is actually called hachures on contour lines. the small marks in the center of the feature are called hachures.observe the picture attached