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Question

A travelling microscope is used during the experiment to measure the
  1. refractive index of a glass slab
  2. resistivity of a given wire
  3. focal length of a convex lens
  4. focal length of a convex mirror

A
focal length of a convex mirror
B
refractive index of a glass slab
C
resistivity of a given wire
D
focal length of a convex lens
Solution
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Experimentally, the refractive index of glass slab is determined with the help of travelling microscope

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