Fascinating Rainbow Science
Explore the magic of rainbows through the dispersion of refracted light, Snell's Law, and the process of how rainbows are made in the sky. Discover the secrets behind what gives rainbows their distinct looks and the intriguing phenomenon of double, triple, and quadruple rainbows.
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Presentation Transcript
RAINBOWS!!! RAINBOWS!!! By: Thomas Marquis
What is a Rainbow? - Leprucauns - Unicorn Poop - Magical Pixies - Dispersion of refracted light cast across the sky
How is a Rainbow Made? - Light passes through a prism - The prism refracts the light because the different wavelengths of light travel at different speeds through materials. - Snell s Law
Snells Law - (sin?1)/(sin?2)=v1/v2=?1/?2=n1/n2 - Originally idea contrived by Ptolemy an Egyptian Greek - Law first described by Ibn Sahl in 984 A.D. - Rediscovered by Thomas Hariot in 1602 - Derived by William Snellius in 1621
Separation of Colors - Due to the different wave length of the colors - Can be found using Snell s Law - Has to pass through a material with a high change of Index of Refraction - The higher the Index of Refraction the better the rainbow
How are Rainbows Made in the Sky? - The light passes through the water droplets in the air - The light refracts inside the water drop - The light reflects of the rear of the water drop and emerges from the bottom of the drop at approximately 45o - The Convex lense shape of the water droplet magnifies the rainbow
What Gives a Rainbow its Distinct Looks? - The refraction angle of the light makes us view rainbows upside down - The rounded shape of the water drop creates circular rainbows - The bottom half of the rainbow is below the horizon unless it is viewed from a high vantage point
Double, Triple, and Quadruple Rainbows - Only one true rainbow - The second rainbow is a double reflection of the back of the water droplet - Due to this the colors of the second rainbow are inverted - Any other rainbows are simply reflections of the first two rainbows
Rainbows Put to Use - Glasses - Magnifying lense - House of horror Mirrors - Microscopes - Telescopes - Eye Balls
Bibliography - "Snell's Law." The Physics Classroom. N.p., n.d. Web. 26 May 2017. <http://www.physicsclassroom.com/class/refrn/Lesson- 2/Snell-s-Law>. - UCSB Science Line. N.p., n.d. Web. 26 May 2017. <http://scienceline.ucsb.edu/getkey.php?key=1542>. - "Rainbow Formation." The Physics Classroom. N.p., n.d. Web. 26 May 2017. <http://www.physicsclassroom.com/class/refrn/Lesson-4/Rainbow-Formation>. - "What is a Double Rainbow?" Local Weather from AccuWeather.com - Superior Accuracy <http://www.accuweather.com/en/weather-news/what-is-a-double-rainbow-1/33889>. . N.p., n.d. Web. 26 May 2017. - Serway, Raymond A, John W. Jewett, and Raymond A. Serway. Physics for Scientists and Engineers, with Modern Physics. Belmont, CA: Thomson-Brooks/Cole, n.d.. Print. - Marquis Thomas. Mr. Brookover s Given High School Physics Notes. East Wenatchee, WA. Print.
