ABSTRACT
The effect of addition of nano Cu on some optical properties of polystyrene has been studied.
For this purpose, many samples have been prepared by adding nano Cu to the polystyrene with
different Weight percentages and different thickness. The absorption spectra have been recorded at the
wavelength ranges (220-800 nm). The absorption coefficient, extinction coefficient and energy gap of
the indirect allowed and forbidden transition have been determined. Results show that the absorption
coefficient and extinction coefficient increase and the energy gap of the indirect allowed and forbidden
transition decreases with the wt. % content of nano Cu.
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