
To calculate the longest wavelength of

Answer to Problem 67A
The wavelength of radiation that could excite an electron is
Explanation of Solution
Given data:
Energy of forbidden gap of silicon
The energy-wavelength relation:
Formula used:
Calculation:
As per problem,
For an electron to be excited from the valence band to the conduction band of silicon,
Calculate the wavelength of radiation using the formula
Rearrange the formula for
Substitute the value
Conclusion:
Thus, the wavelength of radiation that could excite an electron is
Chapter 29 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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