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Parallax Method

50.A student ...

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50.A student perform an experiment of measuring the thickness of a slab with a vernier callipers whose 50 division of the vernier scale are equal to 49 division of main scale. He noted that zero of the vernier scale is between 7cm and 7.05cm mark of the main scale and 23rd division of the vernier scale exactly coincides with the main scale. What is the measured value of the thickness of the given slab using the vernier callipers ?

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