Page 54 - Science Course 3 (Book 2)

Light Waves Mo10-L2a: What are Light Waves and
Electromagnetic Waves?
Lesson 2

Let’s Begin

Light Waves
In this topic, you will learn the following
lessons:
Mo.10–L2a: What are Light Waves and Light is the only type of
electromagnetic wave that you
Electromagnetic Waves? sense with your eyes.
Mo.10–L2b: How Does Light Interacts with
Matter? Light waves and other forms
of electromagnetic waves differ
in wavelength and frequency.
What are Light Waves and
Mo10–L2a
Electromagnetic Waves? An object that produces
light is a luminous
KEY CONCEPTS: object.
1. How does light differ from other forms of electro
magnetic waves?

Key Concept
Vocabulary A-Z What are Light Waves and Electromagnetic

Let us learn some vocabulary Waves?
How does light differ from other forms of
electromagnetic waves?
infrared wave

an electromagnetic wave that has a wavelength
shorter than a microwave but longer than visible
light.

radio wave

a low-frequency, low
energy electromagnetic wave
that has a wavelength longer
than about 30 cm. The Electromagnetic Spectrum

Light is just a tiny part of the wide range of
electromagnetic waves called the electromagnetic
spectrum.
ultraviolet wave
an electromagnetic wave The electromagnetic spectrum consists of
that has a slightly shorter seven main types of waves, ranging from low-
wavelength and higher energy, long-wavelength radio waves to very high-
frequency than visible energy, short-wavelength gamma rays.
light.
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