Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 153
ter, asshown in Fig. 142 and it will look as ifthe spoon is broken in two at the pointwhere it touches the water. The bend-ing of the beam of light will be moreclearly understood from the drawing inFig. 143. If you will look at a star squarelythrough a thick piece of glass and thestar seems to… … Fig. 142.—Light Re-fracted. Spoon inGlass of Water. SEEING THE STARS 133 through a prism the prism affects the light in two ways: first,it bends the beam, and second, it separates the ether waves, orlight waves, as they are called, according to their lengths, andas color depends on the length of…
Astronomy · Stars
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