Question

Sillicon films become better electrical conductor when they are illuminated by protons with energies of 1.14 ev or greater. If we need a material that is photoconductive for any wavelength in the visible spectrum (ie 400 to 700 nm), to what range of photon energies must it respond? E_min,E_max ev.

Answer 1

have length and Eneni En e92RY gelation ん Fon wave lengthh E6.62634(3Io8) 400XIO9 E968 75xo ev 3.1054 er max Fon Wave length んニ100 าวาว่า hc (6: G86 X 10-34) 13x108) # 700 x Lo9 2. 83928 x o1? 7745 er min min. Emax (77 .105 e