Grade 11 · Science · Physics

11th grade How devices use waves to send and capture information and energy worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

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How devices use waves to send and capture information and energy

Grade 11 Science Worksheet - Building Confidence

NameDate

Circle the best answer, or write your answer on the line.

A Wi-Fi router sends at 2.4 GHz. With c = 299,792,458 m/s, what is the wavelength, to 0.01 cm, Ari?
A Wi-Fi router sends at 5 GHz. With c = 299,792,458 m/s, what is the wavelength, to 0.01 cm, Bo?
An FM station broadcasts at 0.1 GHz (100 MHz). With c = 299,792,458 m/s, what is the wavelength, to 0.01 cm, Esme?
Read this first
Use this
Signal strip through a phone call:
4.
In the signal strip, what kind of wave carries the call between the phones, Jun?
- A wave on a wire
- A radio wave
- A sound wave
5.
In the signal strip, what does the microphone do, Kira?
Use the picture in question 4.
- Charges the battery
- Turns sound into a signal
- Sends the sound across the air
6.
What kind of wave does an ultrasound scanner use, Milo?
- Sound waves above hearing
- Radio waves
- X-rays
7.
What carries information along a fiber-optic cable, Noah?
- Moving water
- Sound waves
- Pulses of light
8.
What does a TV remote usually send to the TV, Pia?
- Infrared light
- X-rays
- Sound waves
9.
What energy change happens in a solar cell, Ren?
- Heat to sound
- Light to electrical
- Electrical to light
10.
How does light make a current in a solar cell, Zee?
- Light heats a wire until it glows
- Photons free electrons
- Sunlight pushes the panel

How devices use waves to send and capture information and energy. Every version has 10 questions, and the answer key prints on the second page.

I can say which wave a device uses: phones and Wi-Fi use radio, fiber uses light, remotes use infrared, and ultrasound uses sound.
I can find a radio wavelength from λ = c ÷ f, and an echo depth from speed × time ÷ 2.
I can explain how solar cells turn light into electricity and find a panel's power from efficiency × 1000 W/m² × area.
I can explain how fiber optics trap light by total internal reflection and find a critical angle from sin θc = n₂ ÷ n₁.

Standard: HS-PS4-5

antenna: The part of a device that sends or receives radio waves

echo: A wave reflected back from a boundary

efficiency: The fraction of input energy turned into useful output

critical angle: The angle past which light reflects totally instead of leaving

cladding: The glass layer around a fiber's core, with a lower refractive index

Your child multiplied. Wavelength is speed ÷ frequency: a higher frequency gives a shorter wave.

Your child forgot to halve the time. The pulse goes down and back, so the depth is speed × time ÷ 2.

Your child used cosine. The critical angle is where sin θc = n₂ ÷ n₁, measured from the normal.

What is the most common mistake with how devices use waves to send and capture information and energy?

Your child multiplied. Wavelength is speed ÷ frequency: a higher frequency gives a shorter wave.

Are these 11th grade science worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

Every sheet you scan goes into your child’s record: dated, marked and ready for the year-end portfolio. Homeschool records