lecture 10 100923 - It is against the honor code to click...

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9/24/2010 1 It is against the honor code to “click” for someone else-violators will loose all clicker pts. HITT RF Remote Login Procedure: 1. PRESS AND HOLD THE DOWN ARROW KEY until the GREEN light on the remote turns RED. 2. PRESS THE “0” KEY and you will see the RED light flash GREEN. 3. PRESS THE “9” KEY and you will see the RED light flash GREEN. 4. PRESS AND RELEASE THE DOWN ARROW KEY again and you will see the red light search for the receiver, if it BLINKS GREEN MULTIPLE TIMES you are logged in. The radio channel number for this room is “09” (zero, nine). It is STRONGLY recommended to login your remote for every class just to be sure it is on the correct radio channel and working before class. Interference in Practice Next lab will use Young’s Double Slit Experiment to measuring wavelength of the light Lloyd’s Mirror Thin Films Newton’s Rings DVDs Lloyd’s Mirror Another arrangement for producing an interference pattern with a single light source Wave reachs point P either by a direct path or by reflection The reflected ray can be treated as a ray from the source S’ behind the mirror The positions of the dark and bright fringes are reversed relative to pattern of two real sources This is because there is a 180° phase change produced by the reflection Phase Changes Due To Reflection An electromagnetic wave undergoes a phase change of 180° upon reflection from a medium of higher index of refraction than the one in which it was traveling
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