Tuesday, 13 October 2015

optics - Does the order in which light comes into a rectangular prism affect its dispersion?


I read about how when light comes out of a rectangular prism, there are violet and red fringes on either side of the light spectrum. The website didn't give the specifics in this subject, so I am not sure about how it exactly works.


My "order" I mean if violet or red is on top of the light spectrum coming in.


I pictured both situation and found out no matter which order, light always comes out the same.


situation1 If purple/violet is on top: enter image description here


I am assuming purple will bend more than red, so the order reverses.


situation2 if red is on top: enter image description here



Purple naturally bends more, but this time, the order isn't reversed.




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