[填空题]
When EM radiation is inci z:wuxkz t*e*h rx*cyj2 5j02lde0m5x g 6c-hsdiz0g-tbnt on diamond, it is found that light with wavelengths shorter than 226 nm will caus6t0bmx0cg zh--di5gse the diamond to conduct. What is the energy gap between the valence band and the conduction band for diamond? $E_g$ = eV