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Ch 28: Light & Optics - ORELA Middle Grades General Science

About This Chapter

This chapter is designed to give you the knowledge you need to answer questions related to light and optics on the ORELA Middle Grades General Science assessment. Watch lessons and take short quizzes to increase your chances of success.

Light & Optics: ORELA Middle Grades General Science - Chapter Summary

Addressing questions on light and optics during the ORELA Middle Grades General Science assessment can seem like a challenging task if you haven't reviewed this subject area in months or years. In this chapter, get the thorough review you need to:

  • Define refraction, dispersion, Snell's law and the index of refraction
  • Understand constructive and destructive interference
  • Analyze diffraction and its relation to sound and light
  • Examine the concept of wave-particle duality
  • Discuss light and relativity
  • Describe the theory of general and special relativity

Use the lessons in their video or transcript forms to review light and optics. You can watch fun lessons with entertaining animation or access written transcripts that have highlighted vocabulary terms.

Light & Optics: ORELA Middle Grades General Science Chapter Objectives

The topics in this Light & Optics - ORELA Middle Grades General Science chapter can help you study for questions in the physical science content domain of the exam, which constitutes approximately 31%. The test consists of 150 multiple-choice questions and is taken on a computer. You can prepare by watching the lessons then taking the short quizzes that accompany them.

The ORELA assessment has been replaced by the NES Middle Grades General Science assessment in Oregon. Earning a passing score of at least 228 can help you secure the licensure you need to teach general science to middle grades students.

6 Lessons in Chapter 28: Light & Optics - ORELA Middle Grades General Science
Test your knowledge with a 30-question chapter practice test
Refraction & Dispersion: Definition, Snell's Law & Index of Refraction

1. Refraction & Dispersion: Definition, Snell's Law & Index of Refraction

Refraction explains why light bends in water. But, did you know that mathematical laws determine exactly how light waves are bent? In this lesson, we'll explore the mechanics of wave refraction, including Snell's Law and the index of refraction.

Constructive and Destructive Interference

2. Constructive and Destructive Interference

What happens when one wave meets another? Do the waves converge to make one giant wave? Or, do they destroy each other? In this lesson, we'll explore the workings of wave interference.

Diffraction: Relation to Sound & Light and Effects of Wavelength

3. Diffraction: Relation to Sound & Light and Effects of Wavelength

This lesson explores diffraction as one of the many behaviors of waves. Learn how diffraction occurs in sound and light waves and how it is affected by the wavelength of a wave. Find out how animals use diffraction to communicate and how scientists use it to study molecules.

Wave-Particle Duality: Concept, Explanation & Examples

4. Wave-Particle Duality: Concept, Explanation & Examples

Is light a particle with mass and substance? Or, is it just a wave traveling through space? Most scientists say light is both a particle and a wave! Find out how they came to this strange conclusion as we learn about the theory of wave-particle duality.

Light and Relativity: Breakdown of Classical Relativity with Light Example

5. Light and Relativity: Breakdown of Classical Relativity with Light Example

The speed of light is constant regardless of the source of the light or the position of the observer. However, the components of speed - distance and time - are relative to speed. This lesson uses examples to explain how the relativity of distance and time accounts for the constant speed of light.

General and Special Relativity: Theory and Examples

6. General and Special Relativity: Theory and Examples

Special relativity accounts for the constant speed of light in the absence of surrounding mass. General relativity utilizes the concept of space-time to explain the effect of gravity on the speed of light. This lesson compares special and general relativity and provides examples of how the speed of light is affected by gravity.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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Other Chapters

Other chapters within the ORELA Middle Grades General Science: Practice & Study Guide course

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