Find lowest-frequency photon that can promote an electron

Reference no: EM13982759

The energy gap for ZnS at 300 K is 3.6 eV.

(a) Find the lowest-frequency photon that can promote an electron from the valence band to the conduction band. Answer is in THz

(b) What is the wavelength of this photon?

Reference no: EM13982759

Questions Cloud

What is uncertainty in the position of an electron moving : What is the uncertainty in the position of an electron moving at three-tenths the speed of light if the velocity can be measured at a precision of 15%?

Expected value and variance of the total time required : Suppose each trial for pins takes 12 minutes and each trial for shafts takes 25 minutes. What is the expected value and variance of the total time required?

Mean of an exponential distribution : a. Is the foreman right? If not, what is the MTBF? b. If the MTBF is indeed 72 hours, 50% of the time the TBF will be more than how many hours? c. Why is the mean of an exponential distribution larger than its median?

Explain the nature of the psychological contract : Describe four different views of motivation at work. Explain the nature of the psychological contract. Define the difference between job satisfaction and engagement

Find lowest-frequency photon that can promote an electron : Find the lowest-frequency photon that can promote an electron from the valence band to the conduction band. Answer is in THz. What is the wavelength of this photon?

How the national dna database can be used : How the National DNA Database can be used to provide the Police with new investigative leads and why STR markers are examined?

How much energy is required to ionize a hydrogen atom : Find the wavelength of the emitted photon when an electron makes a transition from the second level to the first level. How much energy is required to ionize a hydrogen atom in its ground state?

Calculate the total energy used by each refrigerator : Calculate the total energy used by each refrigerator over a 10-year lifetime and then compare the total costs--purchase price plus energy cost--assuming electricity costs 10 cents per kilowatt-hour.

Determine the focal length of the projection lens : The projection lens in a certain slide projector is a single thin lens. A slide 23.9 mm high is to be projected so that its image fills a screen 1.74 m high. The slide-to-screen distance is 2.93 m. Determine the focal length of the projection lens..

User Account

All Pages