GaAs has bandgap energy of 1.42 eV. The material would produce photon output at a wavelength of (Planck's constant = 6.625 × 10^-34 J - s, q = 1.6 × 10^-19 C )

A. Metals B. Semiconductors C. Insulators D. All of the above

A. Drift of holes B. Diffusion of holes C. Drift of electrons D. Diffusion of electrons

A. Both A and R are true and R is correct explanation of A B. Both A and R are true but R is not a correct explanation of A C. A is true but R is false D. A is false but R is true

A. Forward bias voltage B. Potential barrier C. Rate of thermal generation of electron hole pairs D. None of the above