# ASSIGN8 - Section Name Assignment 8 Geometrical Optics Section Instructor Concepts reflection Snell's law polarization by reflection images thin

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Section: ______ Name: ______________________________ Section Instructor: ______________________________ Physics 2208, Spring 2009 1 Cornell University Assignment 8: Geometrical Optics Concepts: reflection refraction Snell’s law total internal reflection polarization by reflection chromatic dispersion images mirrors thin lenses magnification Reading in text: Chapter 33: Sections 8-10. Chapter 34: Sections 1-3, 7. Assignment: No quiz on Assignment 8. Due in lecture on Monday March 30. 1. (a) At what angle above the horizon must the Sun be in order for its reflection from the surface of a pond of still water (refractive index 1.33) to be completely polarized? (b) In what direction must the transmission axes of a set of Polaroid sunglasses be oriented in order to completely block out this reflection of the Sun? Please explain. (c) At what angle above horizontal would the Sun then appear to a fish below the water surface? (d) At what angle above horizontal would your horizon (when near the pond) appear to the fish? (e) What would the fish see when looking up towards the water surface in a direction below that in part (d)? Please explain. 2. Optical fibers are used to carry telephone and other communications signals encoded into light beams. A certain fiber of refractive index 1.50 is surrounded by transparent “cladding” of refractive index 1.45.

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## This note was uploaded on 09/01/2009 for the course PHYS 208 taught by Professor Amadeuri during the Spring '08 term at Cornell University (Engineering School).

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ASSIGN8 - Section Name Assignment 8 Geometrical Optics Section Instructor Concepts reflection Snell's law polarization by reflection images thin

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