228s12-l03 - Physics 228 Today: Lenses Website: Sakai...

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Unformatted text preview: Physics 228 Today: Lenses Website: Sakai 01:750:228 or www.physics.rutgers.edu/ugrad/228 IClicker reminder: check if you are getting grades. If not, 1) register your iclicker, and 2) check a week later. If still not, see me at lecture. You may attend either lecture, either day, and get iclicker credit. Physics Study Groups for Physics 228 M 8:10-9:30 ARC 328 W 5:00-6:20 ARC 324 W 8:10-9:30 ARC 326 TH 6:40-8:00 ARC 309 F 1:40-3:00 ARC 333 Sun 8:25-9:45 ARC 326-All sessions will be filled on a first come first served basis, once they are filled, there will be NO NEW SESSIONS ADDED-TO REGISTER: https://secure.rutgers.edu/rlcstudygroup/login.aspx-For more info visit lrc.rutgers.edu or the 228 web page above REGISTRATION OPENS Thursday. Jan 26th AT NOON AND CLOSES Sun. Jan 29th AT NOON Thursday, January 26, 2012 Creating Images We learned we can make a real image with mirrors, but that is not too helpful for putting a camera in your iphone, like the one shown to the left. For that, we will use lenses. Thursday, January 26, 2012 Refraction and Images with a Sphere If all the rays leaving the point P are at small angles with each other, they all get focused to a point P. You can see as increases, a increases - the ray is further from the normal where it meets the sphere, and it is bent more downward. Messy algebra in textbook - I will not repeat here. Result: n a /s + n b /s = (n b-n a )/R Thursday, January 26, 2012 How to Find the Position of the Image But we can show this works on the blackboard - or in the white board... Thursday, January 26, 2012 iClicker 1 of 5!: For the board we have three convex-at lenses....
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228s12-l03 - Physics 228 Today: Lenses Website: Sakai...

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