مقارنة وضوحية نص مكتوب بالالوان الرئيسية مع اللون الاسود في قاعة دراسية مظلمة

Abstract

To determine the accuracy of the details for the text written on a whiteboard is determined through the visibility of this text and contrast between the text and board is written and the separation distance between the vision and written text as well as light and his kind, and the contrast of the major role to determine the details of the written text of what determines the degree of clarity or deceiving the text, and the high contrast between text and the written painting we found more apparent.In this research, we have to write text on a white plant on (red, green, blue, and black) in dark classrooms (without lighting) and studied the contrast of written text, we concluded that the written text in black color on a white board in the dark classrooms is more clear than we written in the other colors in the same conditions, and the distance a role in determine the details of the text if it is found that the more the distance the text is far less clear and there was difficulty in determining the details of the discrepancy because the contrast is this case is little.