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Physics Class 12th Laws of Motion physics ncert exemplar solutions class 12th chapter two

A travelling microscope is used to determine the refractive index of a glass slab. If 40 divisions are there in 1cm on main scale and 50 Vernier scale divisions are equal to 49 main scale division, then least count of the travelling microscope is __________× 10^-6 m.

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Vishal Baghel | Contributor-Level 10

2 months ago

Let ‘x’ be the value of one division on main scale

$x = \frac{1}{40} c m$

Let ‘y’ be the value of one division on vernier

Now given

50y = 49 x

$y = \frac{49 x}{50}$

$\begin{array}{l} = 5 \times 1 0^{- 4} c m \\ = 5 \times 1 0^{- 6} m \\ 5 \end{array}$

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Let ‘v’ be the velocity of third piece

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A travelling microscope is used to determine the refractive index of a glass slab. If 40 divisions are there in 1cm on main scale and 50 Vernier scale divisions are equal to 49 main scale division, then least count of the travelling microscope is __________× 10^-6 m.

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A travelling microscope is used to determine the refractive index of a glass slab. If 40 divisions are there in 1cm on main scale and 50 Vernier scale divisions are equal to 49 main scale division, then least count of the travelling microscope is __________× 10-6 m.

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A travelling microscope is used to determine the refractive index of a glass slab. If 40 divisions are there in 1cm on main scale and 50 Vernier scale divisions are equal to 49 main scale division, then least count of the travelling microscope is __________× 10^-6 m.