how can a vernier caliper gives more decimal places than a ruler? for smart people!?

Answer 1

By the use of the vernier scale which is a small secondary scale, which expands a small graduation on the primary scale so that smaller differences can be measured. It is difficult to explain but is easy to use.

Answer 2

Well, there are two parts to answering this question, first is knowing the answer, the second if putting into words. I'm having some trouble with the second part. The link below describes a vernier pretty well, but still doesn't really explain why a vernier is better than a ruler graduated in, say, thousandths of an inch, the answer is of course that such fine graduations would be hard to see, a vernier allows more widely spaced graduations that are easier to see, the fine increments of the measurement are determined by noting the how well the graduations on the main and vernier scales align. While it might seem that it would be just as hard to determine if a vernier scale aligned as an index mark on and a plain scale, one reason is that the misalignment increases with the deviation from the actual reading, for example; if the reading is .005", it can be hard to tell if the 5 graduation on the vernier scale exactly aligns with the corresponding mark on the main scale, but the pairs of marks on either will show an increasing ly large misalignment making it easier to see where the closest match is.

Answer 3

Using a ruler, you can measure a length to an exact number of graduations (scale marks) and estimate the remaining length between the next marks. A ruler graduated in eighths is less accurate than one graduated in sixteenths of an inch (unless the length is right on a mark). A vernier caliper has one scale for measuring full marks and a second scale to help estimat the remaining length. Of course a vernier caliper can measure diameters more accurately than a ruler which requires the ruler to be placed across an eyeballed diameter.

Answer 4

What limits the accuracy of a ruler is not the rigidity of the ruler itself, but he acuity of your eyesight and your ability to interpolate. However, one is able to determine whether a line is straight to greater precision than interpolation between lines. A vernier exploits this ability by making two lines line up into one at a location corresponding to an extra decimal point of precision.

Answer 5

Instead of using a single scale we use two scales; a main scale and another vernier scale.

Each division of vernier differs by [1/n] th of the main scale division.

Therefore, by an ingenious method of using two scales for measurement we are able to measure the fraction.

The fraction of length that exceeds a main scale division will be multiples of 1/n and hence the vernier enables us to measure that fraction of main scale division.

For example, if the fraction of length that exceeds a main scale division is p /n,
which is equal to p times the “difference between a main scale and vernier division”

Or the length of p main scale divisions is equal to p vernier divisions + p/n main scale divisions.

that is pth main scale division will coincide with p th vernier scale division.

thus the measurment of fraction is possible.

Answer 6

vernier scale is not a ordinary scale....it is used for measuring small diameter..many unit can be calculated from it,,,a circular bob . square box can be measured