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Question: Answered & Verified by Expert
A spectrometer gives the following reading when used to measure the angle of a prism.
Main scale reading: $58.5$ degree
Vernier scale reading : $09$ divisions
Given that $1$ division on main scale corresponds to $0.5$ degree. Total divisions on the vernier scale is $30$ and match with $29$ divisions of the main scale. The angle of the prism from the above data
PhysicsExperimental PhysicsJEE MainJEE Main 2012 (Offline)
Options:
  • A
    $58.59^{\circ}$
  • B
    $58.77^{\circ}$
  • C
    $58.65^{\circ}$
  • D
    $59^{\circ}$
Solution:
1559 Upvotes Verified Answer
The correct answer is:
$58.65^{\circ}$
$\mathrm{L.C} =\frac{1}{60}$
Total Reading $=585+\frac{9}{60}=58.65$

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