A printed page is kept pressed by a glass cube (µ=1.5) of edge 9.0 cm. By what amount will the printed letters appear to be shifted when viewed from the top?

Explanation

To solve the problem of how much the printed letters appear to be shifted when viewed from the top of a glass cube, we can use the concept of refraction and the formula for apparent shift due to a medium with a different refractive index.

### Step 1: Understand the setup
We have a glass cube with a refractive index (µ) of 1.5 and an edge length of 9.0 cm. The printed page is underneath this cube.

### Step 2: Determine the height of the cube
The height of the cube (h) is equal to its edge length, which is given as:
\[ h = 9.0 \, \text{cm} \]
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