A travelling microscope has 20 divisions per cm on the main scale while its Vernier scale has total 50 divisions and 25 Vernier scale divisions are equal to 24 main scale divisions, what is the least

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A travelling microscope has 20 divisions per cm on the main scale while its Vernier scale has total 50 divisions and 25 Vernier scale divisions are equal to 24 main scale divisions, what is the least count of the travelling microscope ?

TestHub · Accepted Answer

One main scale division MSD = 1 20 cm One vernier scale division VSD = 24 25 MSD = 24 25 × 1 20 cm ∴ Least count LC = MSD - VSD = 1 20 1 - 24 25 cm = 1 20 × 1 25 = 1 500 = 0 . 002 cm = 0 . 002 cm

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