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  2. List of reflected light sources - Wikipedia

    en.wikipedia.org/.../List_of_reflected_light_sources

    Earthshine – Light reflected from the Earth; Zodiacal light – Faint solar glow caused by interplanetary dust at sunset and sunrise; Gegenschein – Optical effect of interplanetary dust reflections; Reflection nebula – Clouds of interstellar dust which reflect the light of nearby stars

  3. Category:Light sources - Wikipedia

    en.wikipedia.org/wiki/Category:Light_sources

    Print/export Download as PDF; Printable version; In other projects ... Pages in category "Light sources" The following 61 pages are in this category, out of 61 total.

  4. List of light sources - Wikipedia

    en.wikipedia.org/wiki/List_of_light_sources

    This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...

  5. Wikipedia : Public domain image resources

    en.wikipedia.org/wiki/Wikipedia:Public_domain...

    Free-Images.com – More than 12 Million Public Domain/CC0 stock images, clip-art, historical photos and more. Excellent Search Results. Commercial use OK. No attribution required. No login required. Good Free Photos – All public domain pictures of mainly landscape but wildlife and plants as well

  6. Background (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Background_(astronomy)

    In astronomy, background commonly refers to the incoming light from an apparently empty part of the night sky.. Even if no visible astronomical objects are present in given part of the sky, there always is some low luminosity present, due mostly to light diffusion from the atmosphere (diffusion of both incoming light from nearby sources, and of man-made Earth sources like cities).

  7. File:Lighting units.png - Wikipedia

    en.wikipedia.org/wiki/File:Lighting_units.png

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  9. Gravitational lens - Wikipedia

    en.wikipedia.org/wiki/Gravitational_lens

    The aqua circle is the light source as it would be seen if there were no lens, while white spots are the multiple images of the source (see Einstein ring). A gravitational lens is matter, such as a cluster of galaxies or a point particle , that bends light from a distant source as it travels toward an observer.