S10P1CLec25A

S10P1CLec25A - Physics 1C Lecture 25A "You cant trust your...

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Physics 1C Lecture 25A "You can’t trust your eyes it is your imagination that is out of focus." --Mark Twain
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Diffraction Grating The diffraction grating consists of many equally spaced parallel slits. A typical grating contains several thousand lines per centimeter. You will again get a diffraction pattern that consists of bright and dark spots. The bright spots will be sharper than the double slit case.
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Diffraction Grating The condition for maxima is: where m is 0, 1, 2. ... A central maximum is deFned and the angle θ is still measured with respect to the centerline. The dark spots will be wider than the double slit case. d sin θ bright = m λ
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Polarization of Light Light from the sun is produced by the vibrations of multitude of atoms located there. Each atom produces a wave with its own orientation of the electric Feld. All directions of the electric Feld vector are equally possible and are in a plane perpendicular to the direction of propagation. This type of wave is known as an unpolarized wave.
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Polarization of Light A wave is said to be linearly polarized if the resultant electric Feld vibrates in the same direction at all times at a particular point. It is possible to polarize an unpolarized beam. The most common technique for polarizing light is called polarization by selective absorption.
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In this technique, you use a material that transmits waves whose electric Feld vectors in that plane are parallel to a certain direction. This material also absorbs waves whose electric Feld vectors are perpendicular to that direction. This device is
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This note was uploaded on 06/03/2010 for the course PHYS PHYS 1C taught by Professor F during the Spring '00 term at UCSD.

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S10P1CLec25A - Physics 1C Lecture 25A "You cant trust your...

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