Question

A vernier scale has 10 division. It slides over, the Main scale whose 1 M.S.D is 1.0mm. If the number of division to the left side of zero of the vernier scale themain scale is 49 and the 8th verniear scale division coincides with the main scale, calculate the length in centimeter.​

Answer 1

If I read this correctly the main scale reads 49 mm = 4.9 cm

The vernier divides each mm into 10 parts and the vernier indicates that the final reading is 8/10 ths between 49 mm and 50 mm

Thus the final reading is 49.8 mm = 4.98 cm