Glossary term: Arcoíris
Description: El enorme arco con franjas concéntricas en los colores violeta, índigo, azul, verde, amarillo, naranja y rojo, que se extiende por el cielo y suele verse después de llover, se denomina arcoíris. Cuando un observador ve un arcoíris, el Sol se encuentra a sus espaldas. Un arcoíris se produce porque las pequeñas gotas de agua en el aire descomponen la luz solar blanca en el espectro de colores mediante un proceso llamado dispersión debido a la refracción; esto es similar a cómo funciona un prisma. En un arcoíris normal, la luz se refleja una vez dentro de las gotas de agua, además de dispersarse mediante la refracción.
A veces se pueden ver dos arcoíris anidados, en los que los colores del segundo arcoíris aparecen en orden inverso. El interior, más brillante, se denomina arcoíris primario, mientras que el exterior, más tenue, es el arcoíris secundario. Este fenómeno del arcoíris doble es relativamente poco común. El arcoíris secundario se produce cuando la luz se refleja dos veces dentro de las gotitas de agua, además de refractarse.
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See this term in other languages
Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".
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In Other Languages
- Árabe: قوس قزح
- Alemán: Regenbogen
- Inglés: Rainbow
- Francés: Arc-en-ciel
- Italiano: Arcobaleno
- Chino simplificado: 彩虹
- Chino tradicional: 彩虹
Related Media
24 Hours of Rainbow
Caption: Honorable mention in the 2023 IAU OAE Astrophotography Contest, category of Still images taken exclusively with smartphones/mobile devices.
This panoramic view taken with a smartphone of Livorno, Italy, showcases a series of vivid rainbows captured on three different days in December 2021. Rainbows are the result of sunlight being refracted by water droplets suspended in the air, typically after rainfall or during misty conditions. The water droplets act like a prism, breaking up (refracting) the sunlight into the various colours. The different wavelengths of light are refracted by different amounts, which is why we see this layering of colours. The photographer skillfully merged the most remarkable shots taken on different days to highlight the diverse sizes and brilliance of these rainbows. The locations at which the rainbows appear to be centred are different because each rainbow appeared when the Sun was at a different position in the sky. This composite image beautifully captures the transient yet mesmerising allure of rainbows, illustrating their fleeting appearance and gradual dissipation influenced by the shifting atmospheric conditions.
Credit: Fabrizio Guasconi/IAU OAE (CC BY 4.0)
License: CC-BY-4.0 Creative Commons Reconocimiento 4.0 Internacional (CC BY 4.0) icons
Related Activities
Reading the Rainbow
astroEDU educational activity (links to astroEDU website) Description: By understanding how rainbows work, you can discover about light and its properties, learning about stars, nebulae, galaxies, and our Universe.
License: CC-BY-4.0 Creative Commons Reconocimiento 4.0 Internacional (CC BY 4.0) icons
Age Ranges:
14-16
, 16-19
, 19+
Education Level:
Informal
, Middle School
, Secondary
, University
Areas of Learning:
Interactive Lecture
, Observation based
, Social Research
Costs:
Low Cost
Duration:
1 hour 30 mins
Group Size:
Group
Skills:
Analysing and interpreting data
, Asking questions
, Engaging in argument from evidence



