[单选题]
The energy gap between iltx:/ winwvqko 78 /v..o8gm the valence and conduysb0 :xi+ms8uction bands in a certain semiconductor is 1.25 eV. What is the threshold wavelength for optical absorption in this substa:m+ 8ys0sxbiu nce?
A. $599 \; nm$
B. $959 \; nm$
C. $873 \; nm$
D. $995 \; nm$
Post time 2024-1-14 18:37:39