This is labelled "Incident Light" in blue letters. In the left illustration, a blue arrow points diagonally, down and right, to top centre of the surface. These are labelled "Surface." Vertical, dashed lines stretch down the centre of each illustration, ending at the top centre of each rectangle. Shown are two colour illustrations of the angles of light reflecting off surfaces.īoth illustrations have a long, flat, grey rectangle along the bottom edge. Light reflecting off two surfaces (©2019 Let’s Talk Science). The symbol Ɵ means “angle'' and arrows represent rays of light. The angle of incidence is equal to the angle of reflection. The perpendicular line we call the normal. The angle between the reflected light and a line perpendicular to the surface we call the angle of reflection. The angle between the incoming light and a line perpendicular to the surface we call the angle of incidence.
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