2.3 Light Waves

© The Regents of the University of California. All rights reserved.

Light Waves
Lesson 2.3: Wave Properties

© The Regents of the University of California. All rights reserved.

Activity 1
Warm-Up

5 MIN

Light Waves: Lesson 2.3

​pg 42

Open Ended

What is different between sunlight and the grow light?

© The Regents of the University of California. All rights reserved.

Activity 2
Rereading “Harvesting
Sunlight”

15 MIN

Light Waves: Lesson 2.3

© The Regents of the University of California. All rights reserved.

Key Concept

Activity 2

Light Waves: Lesson 2.3

6. A light source can emit more than one type

of light.

© The Regents of the University of California. All rights reserved.

Today, we will investigate this question:

Activity 2

Light Waves: Lesson 2.3

Investigation Question:
What makes types of light different?

© The Regents of the University of California. All rights reserved.

Activity 2

Light Waves: Lesson 2.3

Scientists often reread
texts to answer specific
questions.

We’ll return to this article
to identify types of light
that have different
effects on plants.

© The Regents of the University of California. All rights reserved.

Activity 2

Light Waves: Lesson 2.3

As you re-read, pg A1-A2 pay careful attention to these Guiding Questions:

● Do plants absorb all types of light?
● What is one type of light that can be used

for photosynthesis?

● Which type of light causes damage to

plants?

Drag and Drop

Plants ​

Placeholder

absorb all types of light.

Drag these tiles and drop them in the correct blank above

do not

do

Multiple Select

Which type of light is used for photosynthesis?

• red light

• yellow light

• blue light

• purple light

Multiple Choice

Which type of light causes damage to plants?

• Infrared Light

• Visible Light

• Ultraviolet Light

• Red Light

© The Regents of the University of California. All rights reserved.

Activity 3
Investigating Different
Types of Light

15 MIN

Light Waves: Lesson 2.3

© The Regents of the University of California. All rights reserved.

Activity 3

Light Waves: Lesson 2.3

We know that different types of light cause
different changes in materials. Next, we’ll
figure out what it is about different types of
light that makes them different.

© The Regents of the University of California. All rights reserved.

Activity 3

Light Waves: Lesson 2.3

Today, you’ll use the Sim
in a new way and make
custom light waves.

You will make two of the
types of light that you
read about and compare
them side by side.

© The Regents of the University of California. All rights reserved.

Activity 3

Light Waves: Lesson 2.3

First, you’ll change the
light source setting to
Custom.

Then, you’ll select Edit
Wave and explore how
you can change the light.

© The Regents of the University of California. All rights reserved.

Investigation Notebook pgs 44–45

Activity 3

Light Waves: Lesson 2.3

​Linked on google classroom

Drag and Drop

Changing the ​

Placeholder

causes the type of light to change.

Drag these tiles and drop them in the correct blank above

wavelength

amplitude

Open Ended

Create a wave that causes photosynthesis in the plant. Take a screenshot and add it where it says show your work. What did you change? What type of light did you create?

Open Ended

Create a wave that causes damage in the plant. Take a screenshot and add it where it says show your work. What did you change? What type of light did you create?

© The Regents of the University of California. All rights reserved.

Activity 4
Reflecting on Wave
Properties

10 MIN

Light Waves: Lesson 2.3

© The Regents of the University of California. All rights reserved.

Activity 4

Light Waves: Lesson 2.3

Let’s watch a video called
“The Shape of Waves.”

It will help explain how
waves carry energy.

© The Regents of the University of California. All rights reserved.

Light Waves: Lesson 2.3

This diagram shows one
wave with a shorter
wavelength and one with
a longer wavelength.

Activity 4 - Screen 1

© The Regents of the University of California. All rights reserved.

Light Waves: Lesson 2.3

As we saw in the video,
amplitude is the height of
a wave.

Let’s discuss using a
larger diagram so we can
compare amplitude and
wavelength.

Activity 4 - Screen 1

© The Regents of the University of California. All rights reserved.

Multiple Choice

The distance between 2 wave peaks.

• frequency

• amplitude

• wavelength

Multiple Choice

The height of a wave.

• frequency

• amplitude

• wavelength

Drag and Drop

The ​

Placeholder

wave has the shortest wavelength.

Drag these tiles and drop them in the correct blank above

blue

red

green

Drag and Drop

The ​ ​ ​

Placeholder

wave has the smaller amplitude.

Drag these tiles and drop them in the correct blank above

red

green

© The Regents of the University of California. All rights reserved.

Key Concept

Light Waves: Lesson 2.3

7. Different types of light have different

wavelengths.

Activity 4 - Screen 1

© The Regents of the University of California. All rights reserved.

Light Waves: Lesson 2.3

Next, you’ll reflect on
what you’ve learned by
completing this diagram.

It shows two different
light sources shining on
the same material.

Activity 4 - Screen 2

Multiple Choice

Which wave type is shining on the object in picture 2 that is causing damage.

• A

• B

• C

© The Regents of the University of California. All rights reserved.

End of Lesson

Published and Distributed by Amplify. www.amplify.com

Light Waves: Lesson 2.3