Question
A photoconductor (see Conceptual Question 13) allows charge to flow freely when photons of wavelength $640 \mathrm{~nm}$ or less are incident on it. What is the band gap for this photoconductor?
Step 1
First, we need to find the energy of the photons with a wavelength of 640 nm. We can use the formula: E_photon = (hc) / λ where E_photon is the energy of the photon, h is the Planck's constant (6.63 x 10^-34 Js), c is the speed of light (3 x 10^8 m/s), and λ is Show more…
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