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GENERAL SCIENCE 



color waves which vibrate more slowly than the red are called infra- 

 red, and those which vibrate faster than the violet are called ultra- 

 violet rays. 



Place a prism in the sunlight and adjust it until a band of color 

 is obtained. 



All colors are traveling at the same velocity, but each color has 

 a different number of vibrations per second. 



* Approximately. 



The Rainbow. Rainbows appear early in the morning or late in 

 the afternoon after a rainstorm has passed over the place. The sun 

 falls upon the raindrops which act much in the same way as the prism, 

 refracting the light and breaking the light waves up into the seven 

 colors. No two persons see the same rainbow, as the same drops 

 of rain are not reflecting the same rays of light into the different 

 observers' eyes. The diamond shows much of the same reflection 

 and dispersion of light as the little raindrops in the atmosphere. 

 Diamond cutters cut the diamonds so as to get the greatest possible 

 amount of light reflection. 



Color of the Sky. Outside the atmosphere the sun would be 

 very blue and the sky black, but the rays of light from the sun, 

 after passing through the atmosphere, have nearly all the blue color 

 sifted out by the atmospheric moisture and dust particles which 

 reflect the blue, giving the appearance of a blue sky. The other 

 colors pass around the particles of the atmosphere more readily. 

 As the amount of dust and moisture increases, different rays of light 

 are reflected, producing beautiful sunsets, and often making it pos- 

 sible to predict the kind of weather for the following day. 



