اندازه گيري بازتابش نامنظم از سطوح مختلف فلزي و غيرفلزي

MEASUREMENTS OF DIFFUSE REFLECTIONS FROM DIFFERENT SURFACES

In this paper, the regular and diffuse reflections from different surfaces are described. A general theory describing such reflections is developed and presented. The experimental arrangement for pursuing such measurements is reported. Design and construction of a beam - expanding telescope required in experimental setup is also presented in this study. velocity of 1m/hr, diameter and feeding tubes loss and number of weirs is calculated hence the heigh of the compartment after the weir is determined. Finaly, these two methods have been compared with practical experiences and it is concluded that if we prevent rubbish from entering, the bottom feeding pumping method is an easier operation.