How many bits of information can be stored on a compact disc

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A compact disc system uses a He-Ne laser, wavelength 633nm, and a lens with a numerical aperture of 0.45. Approximately how many bits of information can be stored on a compact disc of diameter 30 cm? If each sample of the analogue waveform for storage on this disc is represented by 4 bits, how accurately can the signal be reproduced by the disc on playback?

Reference no: EM131196491

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