∂Δnp/∂t = DN∂2Δnp/∂x^2 -Δnp/τn + GL is known as the minority carrier diffusionequation for electrons.
(a) Why is it called a diffusion equation?
(b) Why is it referred to as a minority carrier equation?
(c) The equation is valid only under low-level injectionconditions. Why?