What’s your favorite way to communicate?
• Texting or Video call– Quick and easy!
• Media – Sharing ideas with the world.
• Email – Professional and organized.
• Face-to-Face Conversations – Nothing beats personal
interaction!
• Phone Calls – Direct and personal.
💬 Type your answer in the chat!
If today were a song, what kind of song
would it be? 🎵
Happy pop? Slow and calm? Total rock
anthem?
Feel free to share your title or genre in the chat!
• LT7C- Communicate technical information
about how some technological devices use
the principles of wave behavior and wave
interactions with matter to transmit and
capture information and energy.
 Explain how wave behavior can be used
to transmit information
Lesson Purpose
1
2
3
Explain why
waves are used
to transmit
information.
Compare and
contrast analog
and digital
signals.
Analyze how
electromagnetic (EM)
wave behaviors enable
wireless communication
Engage: Think About It
💬 Prompt:
"You’re 100 miles away from home with no Wi-Fi.
How would you send a photo to your friend?"
🗳️ Poll Options:
📬 Send it via postal mail with a printed copy
📀 Burn it onto a CD and mail it
🌎 Use Morse code and a flashlight (old school)
📷 Take a photo and show it in person later
What are EM Waves?
Electromagnetic waves carry information and
energy. They travel at the speed of light and can
go through space and air.
Why Use Waves?
- Travel long
distances
- Carry energy
and
information
- Behave
predictably
- Can be
modified
(modulated)
Analog vs. Digital Signals
Analog:
- Continuous
wave
- Can degrade
over distance
Digital:
- Made of
binary (1s and
0s)
- More
accurate and
less noise
EM Waves in Communication
- Radio Waves: radio,
TV
- Microwaves:
phones, satellites
- Infrared: remote
controls
- Visible Light: fiber
optics
- Reflection: bounces off
surfaces (e.g., walls)
Wave
Behavior
and
Devices
- Refraction: bends when
entering different materials
- Diffraction: spreads out
around obstacles
- Absorption: energy lost as
heat
🧠 Reading & Thinking Task – Breakout
Room HOTS Challenge
📖 Short Informational Text
"From Morse Code to 5G: The Journey of
Wireless Communication"
Task: In each breakout room, students answer these questions:
o
o
o
What was one surprising fact about communication history?
Why do you think digital signals are more effective for modern
communication?
If you had to design a new communication tool, what signal would you
use—and why?
Sending Signals in
Outer Space
Real-World
Application
Texting During a
Storm
Streaming a Video
in a Subway Station
- Why are waves good
for communication?
Exit
Ticket
- Name one way
analog and digital
signals differ
- Give one real-world
device that uses EM
waves
Thank
You!
Questions?
Thoughts?
Let’s keep the
signal strong! 📶