Measurement Instruments
Interactive Physics Lab Tools
Learn how scientists measure small dimensions with precision using three fundamental techniques. The thread method measures wire diameter by coiling, screw gauges achieve high accuracy through mechanical advantage, and statistical analysis improves reliability through repeated measurements. This simulation helps students understand measurement principles, error reduction, and the importance of precision in scientific experiments. Adjust parameters to see how each technique works in practice.
Number of Turns (n)
10
Total Length (L) in cm
2.5
Calculation Result
Thread Diameter:
0.25 cm
Method: Wrap thread tightly around a pencil for 'n' turns. Measure total length 'L'. Calculate diameter using: D = L / n
Pitch (mm)
1.0
Circular Scale Divisions
100
Calculation Result
Least Count:
0.010 mm
Formula: Least Count = Pitch / Number of Divisions. More divisions give better precision (smaller least count).
Number of Measurements
50
Measurement Precision
Medium
Statistical Results
Mean Value:
5.02 mm
Std. Deviation:
0.15 mm
Principle: Multiple measurements reduce random errors. Mean approaches true value, while standard deviation indicates measurement spread.
