Gallium Arsenide GaA(s) Is a Semiconductor with a Band Gap

Short Answer

Gallium arsenide GaA(s) is a semiconductor with a band gap of approximately 137 kJ/mol.The band gap of gallium nitride (GaN) is about 2.39 times greater than that of GaAs.What wavelength of light does each material emit when electrons in the conduction band fall back into the valence band? Express your answers in nanometers.