A microscope is locused on a mark on a table. When the mark is covered by the plate of glass 3.00cm thick, the microscope had to be raised 1.18cm for the mark to be once more in focus . calculate the refractive index of the glass

v 154.9= 0.9 length length s little over 154.9cm

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this would be about 43%

snell's law

refractve index = sin incidence / sin refraction