The following answer key has selected answers from the light unit. Pages that are not part of the selected answer key have answers within the physics classroom links throughout the agenda.

Light Unit Answer Key

The following pages should be completed by the day of the light unit exam (5/23).

1-2, 7-9, 13-16, 26-34, 44-46 (21 pages total)

Main goal:

Research an interesting topic associated with light and waves and communicate your results to the class.

Class Agenda:

  1. Light wave research project

Research Links:

  1. Library Resources (Login like you would with your email)
  2. The following library resources are fantastic
    • GALE PowerSearch
    • Science in Context
    • Today's Science
    • EBSCO

Homework:

  1. Complete research project
  2. Complete pages 1-2 of Light packet

Main goal:

Be able to explain how we are able to perceive color based on the electromagnetic spectrum.

Class Agenda:

  1. Light waves and visual perception
    1. Introduce light waves and matter (pgs. 1-2)
    2. Color addition (pg. 7)
    3. Color subtraction (pg. 8)
    4. Addition and Subtraction of Light (demo & pgs. 13-14)
    5. Color addition practice (interactive & pgs. 9-10)
  2. Complete light wave research project

Research Links:

  1. Library Resources (Login like you would with your email)
  2. The following library resources are fantastic
    • GALE PowerSearch
    • Science in Context
    • Today's Science
    • EBSCO

Homework:

  1. Complete pages 11-12 of Light packet (use lesson 2a, 2b, 2c of this site to help you with this)

Main goal:

Be able to explain color perception and experiment with lenses to describe how they change the path of light rays.

Class Agenda:

  1. Optical Illusions
  2. Color addition and subtraction
    1. Review page 14 of light packet
    2. Predict colors of images in various lighting conditions (pgs. 15-16, interactive)
  3. Practical uses of mirrors and lenses
    1. Introduce lenses and mirrors
    2. Perform Light Box Lab (pg. 19)

Homework:

  1. Complete "Light Reflection" assignment (pgs. 17-18) use Physics Classroom lessons 1a, 1b, and 1c of this page to assist you

Main goal:

Be able to use line of sight and the law of reflection to determine image locations using mirrors.

Class Agenda:

  1. Review color addition and subtraction
  2. Light wave project presentations
  3. Planar mirrors and the law of reflection
  4. Concave mirror ray diagrams

Homework:

  1. Complete packet pgs. 29-33

Main goal:

Be able to use ray diagrams to represent the interactions of light rays with concave and convex mirrors and lenses.

Class Agenda:

  1. Lens Properties and Applications
  2. Concave and convex mirror and lens ray diagrams simulation
  3. Review concave mirror ray diagrams (pgs. 32-33, readings 3c, 3d, 3e)
  4. Complete convex mirror ray diagrams (pg. 34, readings 4a, 4b, 4c)
  5. Begin concave lens ray diagrams (pgs. 44-45, readings 5d, 5e)
  6. Begin convex lens ray diagrams (pg. 46, readings 5f, 5g)

Homework:

  1. Complete concave and convex mirror and lens ray diagrams (pgs. 32-34, 44-46)

Main goal:

Be able to describe how we see based on light rays and color.

Class Agenda:

  1. Converging light ray demos
  2. Watch "Limits of Light", discuss visual perception, and complete video guide

Homework:

  1. Complete "Limits of Light" video guide

Main goal:

Use Snell's law to model the boundary behavior of light between two media.

Class Agenda:

  1. Finish "Limits of Light"(video guide)
  2. Discuss Snell's Law
  3. Review ray diagrams

Homework:

  1. Attempt Snell's Law practice (pgs. 26-27)

Main goal:

Be able to describe various practical applications of electromagnetic waves.

Class Agenda:

  1. Practice using Snell's Law (pgs. 26-27)
  2. Introduce String Theory
  3. Phone/iPad screen closeup demo
  4. Make a hologram using refractive material
  5. Understand cellular and fiber optic communications -this is partially how the internet works!

Homework:

  1. Complete Snell's Law practice (pgs. 26-27)
  2. Study for Light Exam next class!

Main goal:

Demonstrate your understanding of concepts related to light, color, and visual perception.

Class Agenda:

  1. Brief review
  2. Light Unit Exam

Homework:

  1. Study for final exam!
  2. Begin final exam review guide
  3. Begin note sheet (handed out in class)

Contact: Jeff.Batey@D214.org