Ch 19 ECOM Optical Communication

Refraction is the _____.

The core of a fiber-optic cable is surrounded by _____.

The ratio of the speed of light in air to the speed of light in another substance is the _____.

The most widely used light source in fiber-optic systems is the _____.

The fastest and most sensitive photodiode available is the _____.

Which light emitter is preferred for high-speed data in a fiber-optic system?

Fiber optic cable attenuation is usually expressed in terms of _____.

Which of the following is not a part of the optical spectrum?

Which of the following is not a major benefit of fiber-optic cable?

Fiber-optic cables with attenuations of 1.8, 3.4, 5.9, and 18 dB are linked. The total loss is

Which type of fiber-optic cable is best for very high-speed data?

The main benefit of light-wave communications over microwaves or any other communications ____.

The speed of light in plastic compared to the speed of light in air is _____.

Which type of fiber-optic cable is the most widely used?

The wavelength of visible light extends from _____.

Which of the following is not a factor in cable light loss?

The most important specification in a fiber-optic communication system is the _____.

Which of the following is not a common type of fiber-optic cable?

The core of a fiber-optic cable is made of _____.

Which of the following light sources cannot be used in fiber-optic systems?

Light will not enter and propagate through a fiberoptic cable at an angle to the critical angle

The operation of a fiber-optic cable is based on the principle of _____.

The most common way to modulate a laser is with which of the following types modulation type?

The primary application for fiber-optic networks are in _____.