Download Phy123 Exam2 review

Exam 2: Phy 123 Study Guide
(These are guidelines only, you are expected to know all material coveredin
assignments, lecture, readings, labs, and tutorials.
1. Reflection and Ray Optics
a. Understand how images and objects can be located by:
• Parallax
• Ray-Tracing
b. State the Law of Reflection and give examples to illustrate its meaning.
c. Use Ray-Tracing to show the following characteristics of an image in a curved
mirror (concave and convex):
• Image Location
• Image Type
• Image Size compared to the Object Size (Magnification)
• Image Orientation
2. Refraction and Ray Optics
a. State the Snell’s Law and give examples to illustrate its meaning.
b. Use the concept of refraction to predict the path (and speed) of light as it moves
from one substance to another.
c. Use Snell’s Law and the concept of Refraction to explain the function of a lens.
d. Apply Snell’s law to the explain the operation of such devices as:
• Optical Fiber
• Our eyes
• Glasses
• Prisms
• Cameras
• Telescopes
• Microscopes
3. Calculation related to image formation:
a. Understand the sign conventions with each of the following:
• Concave mirrors
• Convex mirrors
• Diverging lenses
• Converging lenses
b. Use the mirror equation or the thin-lens equation to calculate the following for
single or multiple optical devices:
• Object location
• Image location
• Focal length
• Magnification
Phys. 123: Exam2_Study Guide
Eyres: 2010
Review Mirrors and Lenses:
• The worksheet we did in class with the object at locations within various
standard zones in front of curved mirrors and lenses. You were asked for ray
diagrams, coordinate systems to find whether xi, xo, si, so were positive or
negative.
• Equations relating to curved mirrors and lenses.
• The similar triangles that gave us the equations.
• Parallax
• Lab on Lenses
Review Snell’s Law:
• Lab on Snell’s Law
• You should be able to predict the direction of propagation when a wave travels
from one medium to another. Review the relationship of v, f, , n,  for these
situations.
Do You Understand Outcomes 4-6?
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You should be able to predict image location and characteristics from a verbal
description of the situation, from ray diagrams and from equations. You should
also be able to explain the coordinate system(s).
Can you describe in words or by drawing a picture what one would see when
looking into a mirror or through a lens for different situations and materials?
What would you predict when light (or other waves) pass from one medium to
another.
Could you predict relationships (equations and graphs) between variables such
as v, f, , n, Or between xi, x0, si, s0, f for lenses and mirrors?
4. Light as a Wave
a. Use the concept of wave superposition to explain the fringe pattern resulting
from:
• Thin film interference
b. Explain polarization in terms of vector components
Review:
• Do you remember looking at the Polaroid filters?
• Thin-film Demos
Phys. 123: Exam2_Study Guide
Eyres: 2010