Watch the above You-Tube on reading calipers up to 14:08 (at this point I disagree with his measurement - I think it should be 0.60mm - see if you can explain why)
The video below further explores uncertainty and its appropriate reporting for measurements made with the Vernier Caliper.
The website linked below has a simulation for a caliper with 20 marks on the vernier scale like the ones we use in class. There is also a link to a simulation of one with 10 marks on the vernier scale. For the first two, scroll to the bottom of the page to find the animated simulation, click on the arrows to expand the window, then click on the vernier scale to stop it sliding and set it to make a reading. The site makes the reading in mm and highlights the mark on the vernier scale that allows for the FBG.
Caliper Simulation Website (this reports the answer in mm)
Caliper Simulation (10 mark vernier scale) (this reports the answer in mm and uses a "," in place of a "." to mark the decimal)
You can check your ability to estimate correctly using these two simulations.
Caliper Practice (10 mark Vernier) (the readings on this must be made in cm)
Caliper Practice (20 mark Vernier) (the readings on this must be made in mm)
How does the uncertainty from the first 20 mark vernier compare with that of the ones with 10 marks? How does the uncertainty change when the number of marks on the vernier scale changes? Answer