[填空题]
For a certain semico 2l .w8 e0ae+xvwc(wz kk(ldo0sn)q yrc/tq5+:pb- khnductor, the longest wavelength radiation that can be absorbed is 1.92 mm. What is the energy gap in this s y+)q/hknsq: pbc5 -rtemiconductor? $E_g$ = $ \times 10^{-4}\ \text{eV}$