Nerve impulses.
When several signal transmitted simultaneously. this is called multiplexing of signals.many signal are combined into one and then they transmitted.
it is first converted into an electric signal by your telephone, and then transmitted over the copper wire
the digital signal is converted to analog signal after using by transmitted antenna
When you pluck a string, the guitar pickup creates a signal by capturing the change in magnetic field. This signal is transmitted to the amplifier via a patch cord.
Electronic signal :-)
Analog signals are transmitted as electrical waves.
Yes, this is a true statement. A TV channel is most often characterized by the frequency of its transmitted signal.
Reflection of a transmitted signal is the basic premise of radar and sonar.
Radio Waves
the signal goes out of sink due to refraction
First of all digital signal cant be transmitted wirelessly. digital signal can only be transmitted through optical fibre in the form of pulses. so we have to convert digital signal to analog form with the help of DIGITAL TO ANALOG CONVERTOR ( D TO A CONVERTOR). Then this analog signal should be super imposed on carrier signal called MODULATION. modem can be used for that. then that signal can be transmitted to the air through alloted band width like cellular system with the help of transceiver. at the reciveing end we can demodulate the signal with the help of modem & can convert it back to digital form through A TO D CONVERTOR.
You could be getting a signal from a tracer wire.