| OCR Text |
Show 31 is known the specular reflection of as rays penetr.ats farther into the certain wavelengths directions. of these The reflected phenomenon is also light. medium, and penetrating light then referred to the material selectively absorbs rays and reflects the rest in differ-ent shows as In the second case, some incident the color of the object. This an' internal reflection, by opposition to the external reflection by the outer surfaces of the materials. The to the law of the consideration number 1. had come through pattern surfaces The first called which a may large smooth or various light Figure tangent sphere. diagram. at simple law area under gives rise to follows: surface acts and looks cases degrees of roughness is known equally bright 3.2a as was arise: the light it though as be thrown may into to a "complete from Figure 3.2 (Evans [27]). diffusor". This 'first defined for black an the constant Each a small represented by a is of dashed the from different of distribution area tangent also body radiation. brightness The incident light. different incident angles from This distribution is reflected in given are light of from all directions. represents viewing angles and corresponding reflected as these phenomena, polar diagrams surface appears in -This very the or it may be diffused in all directions. "Lambertian reflector" which semicircles of the nature of the material summarized be always equal only requirement is that the [26])., irregular two diagram shows what a a The is r the surface from behind. illustrate with regardless be flat (jenkins & White of possibilities, To i, light (Figure 3.1). If the surface is definite Such incidence Reflected light from 2. a reflection states that the reflection angle of angle wavelength a of of the surface circle in a the is a: plane . |
