How devices use waves to send and capture information and energy
Grade 11 Science Worksheet - Building Confidence
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:
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
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
What kind of wave does an ultrasound scanner use, Milo?
- Sound waves above hearing
- Radio waves
- X-rays
What carries information along a fiber-optic cable, Noah?
- Moving water
- Sound waves
- Pulses of light
What does a TV remote usually send to the TV, Pia?
- Infrared light
- X-rays
- Sound waves
What energy change happens in a solar cell, Ren?
- Heat to sound
- Light to electrical
- Electrical to light
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