A printed page is kept pressed by a glass cube (μ = 1.5) of edge 6.0 cm. By what amount will the printed letters appear to be shifted when viewed from the top?
2.0 cm
The thickness fo the cube = t = 6.0 cm. The shift in the position of the printed letters is
△t=(1−1μ)t
=(1−11.5)×6.0cm=2.0cm.