The following statements are about wireless transmission. Which one is incorrect
ID: 3858253 • Letter: T
Question
The following statements are about wireless transmission. Which one is incorrect?
A.when electrons move they create electromagnetic waves that can propagate through space, and the number of oscillations per second of a wave is called its frequency
B.the radio, microwave, infrared, and visible light portions of the electromagnetic spectrum can all be used for transmitting information by modulating the amplitude, frequency, or phase of the waves
C.very high frequency (VHF) portion of the spectrum is used for FM radio and TV
D.X-rays and Gamma rays are used in fiber optics
Explanation / Answer
D) is the incorrect statement, we cannot use X-rays and Gamma rays in fibre optics because they are very difficult to generate and very dangerous to handle and gamma rays cannot be reflected and refracted easily it will surely pass through the channel. Because of there frequency cables will absorb them, and data loss will be there.