Physics 112 Work period fo the Mathematical relationships governing lenses (lenses_math_examples.pdf). Work through the first three problems of the practice sheet (lenses_problems.pdf). Another helpful online lenses simulation can be found here: Once loaded, place the mouse over Applet Menu - then Optics - and finally Spherical Mirrors and Lenses - http://surendranath.tripod.com/Applets.html Physics 122 State of the Youth Address : - )  no physics today :- ( Comp Sci 110 Work through unit 11 notes, questions, and assignment. unit_11_questions.pdf unit_11_assignment.pdf