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A small plane mirror is mounted on a wall. A laser beam is incident on the...

A small plane mirror is mounted on a wall. A laser beam is incident on the mirror at a 45° angle, as shown in the figure. The reflected beam makes a spot on a wall 5.0 ? from, and parallel to, the wall with the mirror. When you push on the wall with the mirror, you deform the wall a little, shifting the angle of the mirror slightly and moving the spot on the other wall. If the spot moves by 12.0 ?? (down, in the figure), through what angle has the mirror been rotated?

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