The observation for three materials shows: Material A absorbs all the visible light (opaque) Material B is transparent to all the visible light (transparent) Material C absorbs blue light but is transparent to red light. (Blue light has wavelength 0.4 �m, red light has wavelength 0.7 �m, and all other visible lights have wavelengths in between.) (5.a) Draw corresponding energy band diagram for each sample. (5.b) Rank materials A, B, and C on scale of increasing insulator behavior: (5.c) State the reasons why you ranked as you did in (5.b). (5.d) Predict trend of resistivity as function of increasing temperature for the three samples

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