Helpful Website: . http:// www.darvill.clara.net/emag/index.htm. Do Now. Take a clicker Take a Do Now; put aside. Take a POGIL – do the Warm Up#1-9 Homework: As always, whatever you did not finish in class becomes HW . (POGIL from today) Read & Study corresponding sections in Ch. 27.
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Full Term fetus (what is wrong with this picture?)
Light that reflects at glancing angles from nonmetallic surfaces, such as glass, water, or roads, vibrates mainly in the plane of the reflecting surface.
An incandescent or fluorescent lamp, a candle flame, or the sun all emit light that is not polarized.
The electrons that produce the light vibrate in random directions.
When light shines on a polarizing filter, the light that is transmitted is polarized.
A rope analogy illustrates the effect of crossed sheets of polarizing material.
Besides sunglasses… what other uses of polarizing filters can you think of?
A pair of photographs or movie frames, taken a short distance apart (about average eye spacing), can be seen in 3-D when the left eye sees only the left view and the right eye sees only the right view.
A 3-D slide show uses polarizing filters. The left eye sees only polarized light from the left projector; the right eye sees only polarized light from the right projector.
Each eye sees a different image, and when the brain combines the images, you get a feeling of depth.
Which pair of glasses is best suited for automobile drivers? (The polarization axes are shown by the straight lines.)
Pair A is best suited because the vertical axes block horizontally polarized light that composes much of the glare from horizontal surfaces.