Science
- Reflection (electrical), reflected voltage in an electrical signal due to an impedance change
- Reflection (physics), a common wave phenomenon
- Reflection nebula, nebulae that are extended and have no boundaries.
Psychology
- Introspection, self-reflection
Computers
- Reflection (computer graphics), the techniques for simulating optical reflection
- Reflection (computer science), a programming language feature for metaprogramming
- Reflection, a piece of installation art by Shane Cooper also called "Parasight"
- Reflection, a brand name for a family of terminal emulation and PC X server software products by Attachmate
Entertainment
- "Reflection", a song by progressive rock band Tool from their 2001 album Lateralus
- "Reflection" (song), a song by Christina Aguilera
- Reflection (band), a German thrash metal band
- Reflexion (band), a Finnish gothic metal band
- Reflection (Pentangle album), an album by Pentangle
- Reflection (Demis Roussos album)
- Reflection, an online card game developed by Free Fall Associates
- "Reflection", an episode of Power Rangers: SPD
- Steamhammer (album), by Steamhammer, also known as Reflection
Mathematics
- Reflection (linear algebra), a linear transformation that squares to the identity
- Reflection (mathematics), a transformation of a space
- Reflection formula, which relates function values for arguments on opposite sides of a point
- Reflection group, a group generated by reflections
- Reflection principle, a theorem of set theory
- Point reflection, a reflection across a point
- Reflection theorem, a collection of theorems in number theory
see http:files/DIY_Reflection.pdf [term papers], [web hosting] and [essay papers] it was written for EuroPlop1998 by PeterSommerlad.