試題詳解

複選題
18. The band gap of the semiconductor aluminum phosphide (AlP) is 2.5 eV. What color of light is emitted by AlP diode? (1 eV = 1.6 × 10^-19 J； Planck’s constant: 6.626 × 10^-34 J·s = 4.136 × 10^-15 eV·s)
(A) red
(B) orange
(C) yellow
(D) green
(E) blue