A digital camera uses a CCD detector that is 7.2 mm wide and 5.3 mm tall. (a) If the detector is rated for “4.0 megapixels” and the pixels are equally spaced, what is the distance between the centers of adjacent pixels on the CCD chip? (Use Figure 26.23 to model the arrangement of CCD pixels and ignore any space between the edges of adjacent pixels.) (b) When an object is at infinity, the lens is found to be 1.5 cm from the CCD detector. What is the focal length of the lens? (c) If an object is placed 30 cm from the lens, what spacing between the lens and the CCD detector is required for the image to be at the detector?