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With analog and digital signals.
Microwave signals are being sent through space through electromagnetic waves and not through optical waves. This type of signal is being used mainly in communications because of its narrower beams compared to other signals.
Nerves and muscles.
telephone
Nerves do. Your brain sends electrical signals through your nerves to your muscles to make you move. Signals from the far ends travel through nerves back to your brain, so you can see, hear, smell, taste, and feel.
Nervous tissue is composed of neurons that use electrical signals to transfer impulses throughout the body.
The optical fiber can be used both as unidirectional and bidirectional. The main application of optical fiber is in long-distance links, so there exists no need to employ them as unidirectional. For each direction different wavelengths are used to modulat the signals. At the same time many bidirectional signals can travel through the same optical fiber.
The nervous tissue
Nerve cells can transmit electrical impulses throughout the body.
Your nerves do. Your brain sends electrical signals through your nerves to your muscles to make you move. Signals from the far ends travel through nerves back to your brain, so you can see, hear, smell, taste, and feel.
Your nerves do. Your brain sends electrical signals through your nerves to your muscles to make you move. Signals from the far ends travel through nerves back to your brain, so you can see, hear, smell, taste, and feel.
Different types of information are transmitted from one place to another by signals of light pulses through optical fibers.