An Si abrupt p-n junction is doped with N = 10¹8 cm³ on p-side and N = 5×101 on n-side. Find the penetration of transition region into n-side at equilibrium (300 K). (a) 0.455 μm (b) 0.00227 μm (c) 0.227 μm (d) 0.00455 μm