Question:
The band gap between the valence and the conduction bands in zinc oxide (ZnO) is $3.2 \mathrm{eV}$. Suppose an electron in the conduction band combines with a hole in the valence band the excess energy is released in the form of electromagnetic radiation. Find the maximum wavelength that can be emitted in this process.
Solution:
Click here to get exam-ready with eSaral
For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.