In a spectrometer the smallest main scale division is (1)/(3) of a...

In a spectrometer the smallest main scale division is

\frac{1}{3}

of a degree. The total number of divisions on the vernier scale attached to the main scale is 60 which coincide with the 59 divisions of the main circular scale. The least count of the spectrometer is

Options

A $20^{\prime}$
B20"
C $30^{\prime}$
D30"

Correct answer

B. 20"

Step-by-step solution

No Solution

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