There are two Vernier callipers both of which have 1 cm divided into 10 equal divisions on the main scale. The Vernier scale of one of the calipers (C1) has 10 equal divisions that correspond to 9 main scale divisions. The Vernier scale of the other caliper (C2) has 10 equal divisions that correspond to 11 main scale divisions. The readings of the two calipers are shown in the figure. The measured values (in cm) by callipers C1 and C2, respectively are
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For C1
LC = 1 MSD = 1VSD
= 0.1 mm
Reading = MSR + VSR
= 28 + 0.1 × 7
= 28.7 mm
2.87 cm
For C2
Reading = 29 – 0.1 × 7 = 28.3 mm = 2.83 mm