A microscope is focused on a black dot when a 115 cm-thick
A microscope is focused on a black dot. When a 1.15 cm-thick piece of plastic is placed over the dot, the microscope objective has to be raised 0.370 cm to bring the dot back into focus. What is the index of refraction of the plastic?
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a microscope is focused on a black dot when a 115 cm-thick piece of plastic is placed over the dot the microscope
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