Can we measure sharpness?
is there a way to measure sharpness . If there is , what is the unit it is measured in ...in other words is there a unit for sharpness .
Answer:
I believe so. Pressure = Force/Area. The more force an object has over a smaller area, the more pressure it yields. It would be measure in N per cm^3 according to ISS standards.
Sharpness comes from two smooth planes meeting to a point/edge. The finer the edge i.e. the smaller the end point the sharper the edge. The narrower the angle the sharper the edge.
Sharpness of an edge depends on the smoothness of the surface, the meeting angle, how well the material can be smoothed, and somewhat the hardness of the material.
There are ways to define the surface roughness of a material. I am not familiar with them. Surface polishing or honing will improve the surface finish.
If you shine a laser beam across a sharp edge like a razor blade it will block part of the beam. It will also make a spike at 90 degrees to the edge. I don't know the name of the phenomenon but I have seen it. A perfect edge will only make a single spike. A rough edge will make a number of spikes around 90 degrees. The more light in the other spikes the rougher the edge and less sharp the edge.
At the factory where I once worked we used this to detect "less sharp" medical needles. We threw them away rather than sell them. We did not have a unit of measure to determine how sharp they were or were not.
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Answer:
I believe so. Pressure = Force/Area. The more force an object has over a smaller area, the more pressure it yields. It would be measure in N per cm^3 according to ISS standards.
Sharpness comes from two smooth planes meeting to a point/edge. The finer the edge i.e. the smaller the end point the sharper the edge. The narrower the angle the sharper the edge.
Sharpness of an edge depends on the smoothness of the surface, the meeting angle, how well the material can be smoothed, and somewhat the hardness of the material.
There are ways to define the surface roughness of a material. I am not familiar with them. Surface polishing or honing will improve the surface finish.
If you shine a laser beam across a sharp edge like a razor blade it will block part of the beam. It will also make a spike at 90 degrees to the edge. I don't know the name of the phenomenon but I have seen it. A perfect edge will only make a single spike. A rough edge will make a number of spikes around 90 degrees. The more light in the other spikes the rougher the edge and less sharp the edge.
At the factory where I once worked we used this to detect "less sharp" medical needles. We threw them away rather than sell them. We did not have a unit of measure to determine how sharp they were or were not.
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