RAINBOWS By Thomas Marquis What is a Rainbow

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

Snell’s Law - (sin�� 1)/(sin�� 2)=v 1/v 2=�� 1/�� 2=n 1/n 2 - 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 45 o - 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 Accu. Weather. com - Superior Accuracy™. N. p. , n. d. Web. 26 May 2017. <http: //www. accuweather. com/en/weather-news/what-is-a-double-rainbow-1/33889>. - 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.