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Simulation of The Textbook Sunset

The red Sun sets first, leaving the green image for a second or so. Clearly Dietze was right: refraction in the Standard Atmosphere cannot produce a green flash the unaided eye can see.

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http://mintaka.sdsu.edu/GF/explain/simulations/std/stdatmSS.html

Light & Optics - Online meteorology guide

An excellent guide to meteorological effects such as rainbows, halos and red sunsets, explained using basic physics.

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http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/opt/home.rxml

Red Giant

This site gives the story of the history of the universe and this page covers red giants.

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http://www.historyoftheuniverse.com/starold.html

The Hubble Law

Measuring the red shift for several galaxies from spectral lines.

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http://zebu.uoregon.edu/nsf/hub.html

The Science of Light - Coloured Shadows

Users can move an object and see how the shadows move on an opposite wall. To make things easier to see the light is from a green and red bulb - uses JAVA.

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http://www.learner.org/teacherslab/science/light/color/shadows/index.html

Polarizers

A practical demonstration of polarization in which unpolarized red light is passed through a optical bench

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http://lectureonline.cl.msu.edu/~mmp//kap24/polarizers/Polarizer.htm

National Solar Observatory Digital Library

Recent solar images, coronal scans, Ca-K and red images. Library of images available. Some of the information in this site is also aimed at adults.

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http://diglib.nso.edu/

Visible light waves are the only electromagnetic waves we can see. We see these waves as the colors of the rainbow. Each colour has a different wavelength. Red has the longest wavelength and violet ...

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http://science.hq.nasa.gov/kids/imagers/ems/visible.html

Infrared Waves

Infrared light lies between the visible and microwave portions of the electromagnetic spectrum. Infrared light has a range of wavelengths, just like visible light has wavelengths that range from red ...

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http://imagers.gsfc.nasa.gov/ems/infrared.html

Why the moon is seen red during total lunar eclipse?

A simple explanation, accompanied by a clear diagram, of why the eclipsed moon appears red.

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http://www.hk-phy.org/iq/red_moon/red_moon_e.html

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