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Ch 18: Light, Sound & Waves

About This Chapter

This chapter touches on a wide variety of scientific concepts and studies related to light, sound and waves, with engaging lessons taught by professional instructors available for your questions.

Light, Sound & Waves - Chapter Summary

This chapter is all about the scientific examination of light, sound and waves, digging into a diverse list of concepts within the fields. Topics covered include the nature of light, infrared waves, prisms, and resonance, as well as all of the following:

  • Ultraviolet light
  • Gamma rays
  • Wireless communication
  • Speed of sound
  • Pitch and volume
  • The interaction of sound wave properties and sound perception
  • Mirrors
  • Lens types
  • Transverse and longitudinal waves
  • Wave parameters and interference

Though the amount of material may appear daunting, the dashboard feature provides a simple way to stay organized, with records of your recent activity and progress through the chapter. The practice quizzes accompanying each lesson can also help you make sure you understand one subject before continuing to another.

15 Lessons in Chapter 18: Light, Sound & Waves
Test your knowledge with a 30-question chapter practice test
The Nature of Light: Origin, Spectrum & Color Frequency

1. The Nature of Light: Origin, Spectrum & Color Frequency

This lesson introduces the basics of visible light and color. Learn how the visible light spectrum is divided into the six color ranges. We'll also discuss why different people name colors in different ways.

What is Ultraviolet Light? - Definition, Wavelength & Uses

2. What is Ultraviolet Light? - Definition, Wavelength & Uses

Ultraviolet light is invisible to the human eye but is very important for life. In this lesson, we'll learn where UV light comes from, how it affects living things, and how it is used in many other applications.

Infrared Waves: Definition, Uses & Examples

3. Infrared Waves: Definition, Uses & Examples

This lesson will explain what infrared waves are, discuss a number of examples of infrared waves, and describe how we as humans use them. A short quiz will follow.

What Are Gamma Rays? - Definition & Examples

4. What Are Gamma Rays? - Definition & Examples

Explore gamma rays and where they fit in relationship to other forms of electromagnetic energy, such as radio waves and x-rays. Learn what events and celestial bodies produce gamma rays, from nuclear explosions to supernovas.

Wide-Area Wireless Communication: Microwave, Satellite, 3G, 4G & WiMAX

5. Wide-Area Wireless Communication: Microwave, Satellite, 3G, 4G & WiMAX

Wide-area wireless communication travels large distances, from several kilometers to thousands of kilometers. Learn how much of the world's communication uses microwaves in cellular networks, WiMAX and satellite communications.

What is Sound? - Definition and Factors Affecting the Speed of Sound

6. What is Sound? - Definition and Factors Affecting the Speed of Sound

Explore the minute workings of sound waves and how they travel. We'll discuss the main factors that affect the speed of sound waves, and we'll try some mathematical problems involving the wave equation.

Pitch and Volume in Sound Waves

7. Pitch and Volume in Sound Waves

What do pitch and volume mean when talking about sound waves? Further your understanding of sound waves in this lesson as we explore the more familiar aspects of sound. We'll learn about pitch and volume and how they relate to sound wave parameters.

Relationship Between Sound Wave Properties & Sound Perception

8. Relationship Between Sound Wave Properties & Sound Perception

After completing this lesson, you will be able to describe the properties of sound waves and explain how they relate to what you hear when you listen to a sound. A short quiz will follow.

Resonance: Definition & Transmission of Waves

9. Resonance: Definition & Transmission of Waves

This lesson describes how sound and light waves are affected by the principle of resonance. Learn how resonance occurs through the vibrations and resonant frequencies of objects. You'll investigate everyday examples of resonance and learn how to break a wine glass with your voice!

Mirrors: Difference Between Plane & Spherical

10. Mirrors: Difference Between Plane & Spherical

After watching this lesson, you will be able to explain what a mirror is and how plane mirrors and spherical mirrors are different, including the images they produce. A short quiz will follow.

Lens Types: Simple, Compound & Other Types

11. Lens Types: Simple, Compound & Other Types

In this lesson we will explore what a compound lens is versus a simple lens as well as what it means for a lens to be concave or convex and how these particular lens shapes can be used to correct certain visual impairments.

What is a Prism? - Definition & Refraction

12. What is a Prism? - Definition & Refraction

In this lesson, you'll learn about the prism and what prisms do to white light. You'll explore the properties of light waves, as well as the concept of refraction, which causes white light to bend in a prism and spread out into the different spectrum of colors.

Transverse & Longitudinal Waves: Definition & Examples

13. Transverse & Longitudinal Waves: Definition & Examples

What comes to mind when you think of a wave? Chances are your mental image takes the form of a transverse wave. But, longitudinal waves are just as important, and understanding the difference is vital to learning about waves. In this lesson, explore both types of waves and the unique characteristics of each.

Wave Parameters: Wavelength, Amplitude, Period, Frequency & Speed

14. Wave Parameters: Wavelength, Amplitude, Period, Frequency & Speed

How do we measure and describe waves? How do waves differ based upon their shapes? This lesson will guide you through the five wave parameters - period, frequency, amplitude, wavelength, and speed - that we use to characterize waves.

Constructive and Destructive Interference

15. 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.

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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