Gholamreza Tousian Shandiz - Assistant Professor, Payam Noor University, Tehran, Iran
Majid Akhshabi - Assistant Professor, Payam Noor University, Tehran, Iran
Majid Ahmadi - M.A. Art Research, Payam Noor University, Tehran, Iran

The first date that we know about using of light is the ۳rd century of the ۴th millennium BC. At that time light to be used to create a surface difference in the level of the external walls in order to obtain light and shade.The amount of light, color and sound that we need differs in different spaces and depends on the type of use of the space and its functions. Some spaces are probably used during the day or only at night and some architecture used both in day and night. Therefore, these issues should be taken into consideration when choosing the materials and its features to use light, color and sound for the desired space.Many principles are effective in designing of light, color and sound in nowadays architecture and one of them is the principle of surface difference and the existence of levels of perceptions of light, color and sound that were used to absorb and reflect, refract and diffract of light, color and sound into the space of the architecture.The question of article is how surface difference in light, color and sound are designed to be reflected, refracted, and diffracted in the architectural space?

Surface, Difference, Light, Color, Sound