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  2. 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 ...

  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 reflected light sources - Wikipedia

    en.wikipedia.org/.../List_of_reflected_light_sources

    Print/export Download as PDF; Printable version; In other projects ... This is a list of reflected sources of light examples in contrast to the List of light sources ...

  5. Umbra, penumbra and antumbra - Wikipedia

    en.wikipedia.org/wiki/Umbra,_penumbra_and_antumbra

    An alternative definition is that the penumbra is the region where some or all of the light source is obscured (i.e., the umbra is a subset of the penumbra). For example, NASA 's Navigation and Ancillary Information Facility defines that a body in the umbra is also within the penumbra.

  6. File:Lighting units.png - Wikipedia

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

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    The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

  8. Light - Wikipedia

    en.wikipedia.org/wiki/Light

    The main source of natural light on Earth is the Sun. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight.

  9. Available light - Wikipedia

    en.wikipedia.org/wiki/Available_light

    In photography and cinematography, available light (also called ambient light or practical light) refers to any source of light that is not explicitly supplied by the photographer for the purpose of taking pictures. The term usually refers to light sources in the surrounding environment that are present naturally (such as sunlight or moonlight ...