At present, a compact disc can only hold about 1 hour of music. This limit is due in large part to the fact that
A) a compact disc cannot turn faster than about 5 turns per second without experiencing a net torque of zero.
B) light cannot be focused to a spot that is significantly smaller than its wavelength.
C) the ridges in the aluminum layer of the compact disc cannot experience destructive interference unless they have a wavelength that is almost equal to the distance between them.
D) a compact disc cannot turn slower than about 5 turns per second without experiencing a net torque of zero.

Question

Quizplus · Accepted Answer

The limit on the amount of music a compact disc can hold is primarily due to the physical limitation of focusing light to a spot size, which is constrained by the wavelength of the light used in the reading process. This affects the density at which data can be stored on the disc.

At Present, a Compact Disc Can Only Hold About 1