Question

a microscope is provided with a main scale graduated with 20 divisions in 1 cm and a vernier scale with 50 divisions on it of length same as of 49 divisions of main scale. Find the least count of microscope ​

Answer 1

Answer:

Value of 1 main scale division MSD=0.5mm

Least count=1MSD=0.5mm

20MSD=1cm

1MS=120cm

50VSD=49MSD

1VSD=4950MSD

⇒4950(120)cm

49MSD

1VSD=4950MSD

⇒4950(120)cm

⇒491000cm

LC=(120−491000)cm

⇒11000cm

⇒0.001cm