The mean life of a certain computer hard disk in continual use is 3 years. How l

Question

The mean life of a certain computer hard disk in continual use is 3 years. How long a warranty should be offered if the vendor wants to ensure that more than 24 percent of the hard disks will fail within the warranty period? (Round your intermediate values to 4 decimal places and final answer to 4 decimal places.) Period of warranty years How long a warranty should be offered if the vendor wants to ensure that more than 35 percent of the hard disks will fail within the warranty period? (Round your intermediate values to 4 decimal places and final answer to 4 decimal places.) Period of warranty years

Explanation / Answer

Here , for the energy released and the energy of photon

h * c/wavelength = Eo * Z^2 * (1/n1^2 - 1/n2^2)

6.626 *10^-34 * 3 *10^8/(wavelength) = 13.6 *1.602 *10^-19 * 11^2 * (1/3^2 -1/4^2)

solving for wavelength

wavelength = 15.5 *10^-9 m = 15.5 nm

the wavelength is 15.5 nm

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