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2. 37 Free Halloween Coloring Pages for Kids

   www.aol.com/37-free-halloween-coloring-pages...

   We've got you covered with free printable Halloween coloring activity pages for kids, from zombies to witches and everything in between.

3. Rotations and reflections in two dimensions - Wikipedia

   en.wikipedia.org/wiki/Rotations_and_reflections...

   These equations can be proved through straightforward matrix multiplication and application of trigonometric identities, specifically the sum and difference identities.. The set of all reflections in lines through the origin and rotations about the origin, together with the operation of composition of reflections and rotations, forms a group.

4. Specular reflection - Wikipedia

   en.wikipedia.org/wiki/Specular_reflection

   Specular reflection, or regular reflection, is the mirror-like reflection of waves, such as light, from a surface. [ 1 ] The law of reflection states that a reflected ray of light emerges from the reflecting surface at the same angle to the surface normal as the incident ray, but on the opposing side of the surface normal in the plane formed by ...

5. Reflection symmetry - Wikipedia

   en.wikipedia.org/wiki/Reflection_symmetry

   In mathematics, reflection symmetry, line symmetry, mirror symmetry, or mirror-image symmetry is symmetry with respect to a reflection. That is, a figure which does not change upon undergoing a reflection has reflectional symmetry. In 2-dimensional space, there is a line/axis of symmetry, in 3-dimensional space, there is a plane of symmetry.

6. Lambertian reflectance - Wikipedia

   en.wikipedia.org/wiki/Lambertian_reflectance

   Diagram of Lambertian diffuse reflection. The black arrow shows incident radiance, and the red arrows show the reflected radiant intensity in each direction. When viewed from various angles, the reflected radiant intensity and the apparent area of the surface both vary with the cosine of the viewing angle, so the reflected radiance (intensity per unit area) is the same from all viewing angles.

7. Fresnel equations - Wikipedia

   en.wikipedia.org/wiki/Fresnel_equations

   The agreement of the other field with the red arrows reveals an alternative definition of the sign convention: that a positive reflection or transmission coefficient is one for which the field vector in the plane of incidence points towards the same medium before and after reflection or transmission.