Which statement is not true of optical fiber?
Optical fiber completely reflects light rays.
Optical fiber can be made either of glass or plastic.
Optical fiber is about the same thickness as copper wire.
Optical fiber can carry thousands of phone conversations.
Optical fiber is about the same thickness as copper wire.
In an operating room, which device would you not expect to find connected to an optical fiber cable?
monitor
camera
scalpel
microscope
Scalpel.
Which of the following is not a typical benefit from the use of optical fibers for surgery?
Doctors can use laser light to seal blood vessels and stop bleeding.
Surgeons can make smaller cuts, or incisions, in a patient’s skin.
Surgeons can repair damage to joints, such as knees, more effectively.
Doctors can examine internal organs without having to perform major surgery.
Surgeons can repair damage to joints, such as knees, more effectively.
What is necessary to achieve total internal reflection?
a mirror
a large angle of incidence
a small angle of incidence
an optical fiber
A large angle of incidence.
Total internal reflection _____.
allows no light to escape from an optical fiber
prevents you from seeing the bottom of a swimming pool
causes light rays to travel in parallel lines through optical fiber
allows most laser light to be reflected inside an optical fiber
Allows most laser light to be reflected inside an optical fiber.
To determine which statement is not true of optical fiber, we can examine each statement and compare it to the characteristics of optical fiber.
1. "Optical fiber completely reflects light rays."
This statement is true. Optical fiber is designed to efficiently transmit light signals by bouncing them off the internal walls of the fiber through a process called total internal reflection.
2. "Optical fiber can be made either of glass or plastic."
This statement is also true. Optical fibers can be made from either glass or plastic materials, with glass being the most common choice due to its superior optical properties.
3. "Optical fiber is about the same thickness as copper wire."
This statement is not true. Optical fibers are significantly thinner than copper wires. A standard fiber optic cable is typically around 0.3 mm to 0.5 mm in diameter, whereas a copper wire used for telecommunications typically ranges from 0.4 mm to 0.8 mm in diameter.
4. "Optical fiber can carry thousands of phone conversations."
This statement is true. Optical fibers have a high bandwidth, which means they can carry a large amount of information simultaneously. A single optical fiber can transmit thousands of simultaneous phone conversations or a vast amount of data.
Therefore, the statement that is not true of optical fiber is:
"Optical fiber is about the same thickness as copper wire."