Physics WAEC

A microscope is focused on a mark on a table, when the mark is covered by a plate of glass 2m thick, the microscope has to be raised 0.67cm for the mark to be once more in focus. Calculate the refractive index.

A. 1.52
B. 1.68
C. 2.58
D. 1.82

Correct Answer: Option A

A. 1.52

SEE ALSO A sonometer wire of linear density 0.08kgm‾¹ subjected to a tension of 800N is plucked. Calculate the speed of a pulse which moves from one end of the wire to the other
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