![]() We say that gloves have a “right or left-handedness,” whereas a pair of socks do not. Gloves have a “handedness”Ī pair of socks, on the other hand, are superimposable because you can rotate the socks such that they can be paired together. ![]() For example, a pair of gloves are nonsuperimposable…in other words there is no way to rotate the right and left hand gloves such that they can be laid on top of each other and look the same. Such molecules are called enantiomers of each other. A molecule of such a substance will have another version of itself with the same chemical formula but that is nonsuperimposable. A polarizer blocks all the light except for that which is oscillating in the direction of the polarizer.Ĭhiral substances are carbon based compounds which contain four different substituents (a substituent is something bonded to the carbon). Light from a flashlight oscillates in all directions. This is because conductive polymer chains in polarized lenses are all aligned in one direction. ![]() If the light passes through a polarized film, say through the lens of polarized sunglasses, only light with a specific orientation is allowed to pass. Light from the sun or from a light bulb is said to be unpolarized because the electric and magnetic fields in the wave oscillate at right angles to each other and randomly in any direction in space. CAUTION: Cover the light source with a cloth so you are not staring directly at the light source. Clamp the PVC pipe to a ring stand such that the light source is at the bottom shining up into the pipe.Place the dial (copper fitting) into the top of the PVC tube and be sure it rotates freely in the tube. Make a black line on the copper fitting using a sharpie marker to read the angle of rotation.This will serve as the “lens” for the polarimeter.Ĭopper fitting and polarizer “lens” for the polarimeter Glue the other piece of polarized film to top of the copper fitting (the threaded end) using the epoxy glue. ![]() Tape the protractor template to the body of the tube about 3/4” below the top.You should laminate the template to prevent it from getting wet. Label each line successively starting at 0°, 22.5°, 45°, 67.5°….etc. Each line represents 22.5° when wrapped around the tube.Print a protractor dial template and use a copy machine to fit the dial such that its length is the same as the circumference of the tube.Glue one of the pieces of polarized film to the bottom of the PVC pipe using the epoxy glue.Cut the PVC pipe to desired length (30″ PVC holds about 200 mL of solution). ![]()
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