A real CD can hold approximately 600 Mbytes of information. Each byte is an 8-bit binary number, so it takes eight digits of zeros and ones to make 1 byte. So that each pit edge can be optically resolved by the laser beam that reflects from the CD (Fig. 26.30), the length of a pit must be no smaller than the wavelength. Assume each pit on a CD stores 2 bits of information (two edges), the pits are 3λ long, and λ = 503 nm in the plastic of the CD. Approximately how many megabytes of information can be stored on this model of CD? Explain why your number agrees or does not agree with the storage capacity of a real CD.