Final answer:
The question is asking for the groove spacing on a CD, which involves using the interference pattern created by the reflection of a laser beam. The information about the CD rotating at 44 rad/s is not directly relevant to determining the groove spacing.
Step-by-step explanation:
The question seems to be asking for the spacing of grooves on a CD, based on the pattern produced by a laser beam reflection when the CD is rotating at a given angular speed. However, there appears to be a confusion in the question since the angular speed provided (44 rad/s) is not relevant to finding the spacing of grooves from the given fringe pattern information.
To determine the spacing of the grooves on a CD, one needs to apply the principles of diffraction and interference of light. The distance from the axis of rotation would not influence this spacing directly, but could impact the location of the bright and dark fringes in the interference pattern observed on a wall. To solve for the groove spacing, one would use the equation relating the wavelength of the incident light, the distance to the wall, the distance between the fringes, and the order of the fringe observed.