WorksheetsCommunication waves
Total questions: 12
Worksheet time: 7mins
Optical fibers are used to transfer information in the form of light over long distances. Which of the following explains how light travels through an optical fiber?
Light enters the optical fiber.
Any light that hits the side of the fiber gets refracted within the fiber instead of exiting the fiber.
Any light that hits the side of the fiber gets reflected within the fiber instead of exiting the fiber.
Optical fibers work because of total internal reflection.
Optical fibers work because of total internal refraction.
What may happen if an optical fiber is bent too far?
It will have total internal reflection.
It will leak light, which is called total internal reflection.
It will lose total internal reflection, and the light will be lost to diffraction.
It will lose total internal reflection, and the light will be lost to refraction.
Which of the following would you do to increase the resolution of this image?
Use a better camera.
Increase the number of pixels.
Collect more data by having smaller pixels.
Collect more data by having bigger pixels.
What are some advantages of communicating through digital waves compared to analog waves?
Digital waves tend to have lower resolution and worse sound.
Digital waves tend to have higher resolution and better sound.
They can be copied and stored reliably.
They are harder to copy and store.
True or False: Modulated waves can be analog or digital.
True
False
True or False: Analog waves are low frequency.
True
False
True or False: Analog communication is mechanical, not electric.
True
False
True or False: Radio waves are part of the electromagnetic spectrum.
True
False
Which of the following answer choices explains what digital means?
Data expressed as single digits, usually 0 and 1
Smooth and continuous data
Electrical
computerized
