15.5 BANDWIDTH OF TRANSMISSION MEDIUM
Chapter 8: Chapter 15 · PHYSICS PART-2 · EN medium
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Similar to message signals, different types of transmission media offer different bandwidths. The commonly used transmission media are wire, free space and fiber optic cable. Coaxial cable is a widely used wire medium, which offers a bandwidth of approximately MHz. Such cables are normally operated below GHz. Communication through free space using radio waves takes place over a very wide range of frequencies: from a few hundreds of kHz to a few GHz. This range of frequencies is further subdivided and allocated for various services as indicated in Table . . Optical communication using fibers is performed in the frequency range of THz to THz (microwaves to ultraviolet).
📖 NCERT Class 12 Physics Part 2 · Page 214
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Similar to message signals, different types of transmission media offer different bandwidths. The commonly used transmission media are wire, free space and fiber optic cable. Coaxial cable is a widely used wire medium, which offers a bandwidth of approximately MHz. Such cables are normally operated below GHz.
Communication through free space using radio waves takes place over a very wide range of frequencies: from a few hundreds of kHz to a few GHz. This range of frequencies is further subdivided and allocated for various services as indicated in Table . . Optical communication using fibers is performed in the frequency range of THz to THz (microwaves to ultraviolet).
An optical fiber can offer a transmission bandwidth in excess of GHz. Spectrum allocations are arrived at by an international agreement.
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