
To find:
The

Answer to Problem 18.34QA
Solution:
a)
b)
c)
Explanation of Solution
1) Concept:
To find the wavelength corresponding to band gaps for semiconducting phosphides, we need to use the
2) Formula:
3) Given:
i)
ii)
iii)
iv)
v)
vi) Avogadro’s number
4) Calculations:
a) Wavelength of
The energy gap is the minimum energy needed to excite the electrons from the ground state for the conduction. From this energy, we can calculate the light energy needed to excite the electrons from their ground state to conduction band.
First we will calculate the energy, J/photons, by using Avogadro’s number.
Wavelength of
b) Wavelength of
First we will calculate the energy, J/photons, by using Avogadro’s number.
Wavelength of
c) Wavelength of
First we will calculate the energy, J/photons, by using Avogadro’s number.
Wavelength of
Conclusion:
The wavelength is calculated from the energy gaps present in the semiconductors and Avogadro’s value.
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Chapter 18 Solutions
Chemistry: An Atoms-Focused Approach
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