What should be the band width of frequencies. Required for transmission of picutres using video signals?

Why are high frequency carrier waves used for transmission ?

What is the range of frequencies used for TV transmission? What is common between these waves and light waves?

Assertion : The information contained in our original low frequency baseband signal is to be translated into high or radio frequencies before transmission. Reason: For transmitting a signal, the antenna should have a size comparable to the wav elength of the signal.

(a) For a ray of light travelling from a denser medium of refractive index n_(1) to a rarer medium of refractive index n_(2) , prove that (n_(2))/(n_(1)) = sin i_(c) , where i_(c) is the critical angle of incidence for the media. (b) Explain with the help of a diagram, how the above principle is used for transmission of video signals using optical fibers.

What mode of communication is employed for transmission of Tv signals?

A radio signal has a frequency of 10 M Hz. The least length of the antenna required for the trans mission of the signal is

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