Coarse is ruff/hard, and fine grain is smooth/ soft!
The course adjustment moves the stage of the microscope further/closer away from the objective lens (it is used for general focusing), and the fine adjustment moves the objective lens very small distances for finer focusing.
The coarse focus on a microscope is provided to move the instrument quickly to where it is nearly in focus. Some microscopes only have a coarse focus. The fine focus is used to move with slower and more precise adjustment to where the instrument is exactly in focus.
The coarse focus adjustment moves the lens (or the stage, depending on the construction of the microscope). So does the fine adjustment but the fine does it much less and much more accurately (less play in the gears)
The coarse adjustment knob on a microscope is used for making large changes in the focus of the specimen, allowing for quick and rough focusing at low magnifications. In contrast, the fine adjustment knob provides precise control for making small adjustments to the focus, enabling detailed viewing of the specimen at higher magnifications. Using both adjustments effectively allows for clear and accurate observation of microscopic details.
This is the coarse adjustment knob. This should be used before the fine adjustment knob (the smaller knob) - which is for fine focusing.
Coarse is ruff/hard, and fine grain is smooth/ soft!
fine grained
Fine grained has larger crystals and coarse grained has smaller crystals
Fine grained has larger crystals and coarse grained has smaller crystals
Fine grains are harder than coarse grains
coarse pearlite structure has better ductility and toughness compared to fine pearlite structure but fine pearlite structure has better strength compared to coarse pearlite structure.
fine grained or coarse grained
unc is coarse, unf is fine pitch
Extrusive igneous rocks generally have a fine grain texture. This is because they cool quickly on the Earth's surface, causing the minerals to form small crystals.
Granite - coarse grained. Basalt - fine grained.
The difference between hardwood and softwood is in the closeness of the grain. For instance the timber that comes from eucalyptus is close and fine grained and is classed as a hardwood. Pine has a loose coarse grain and is a soft wood. Balsarwood as used in model airplanes is also classed as hardwood, because of it's grain not because of it's hardness.
The grain size of coal can vary, but it typically ranges from fine particles to larger chunks. Coal can be classified based on its grain size as fine, medium, or coarse coal. The grain size of coal can impact its combustion efficiency and handling characteristics.