You may have noticed that television antennas onhousetops have metal rods mounted horizontally (Figure 23.112),at least in the United States (we're not talking about satellitedishes). What does this imply about the construction of thetransmitting antennas used by television stations? Why?

In figure represents a transmitter and receiver such the metal rods of transmitter are parallel to the metal rods of the receiver

A type of energy known as electromagnetic radiation spreads as electrical and magnetic waves that move in units of energy known as photons. Electromagnetic radiation has a spectrum with varied wavelengths and frequencies, which in turn imparts various properties.

Think about how the metal rods on the transmitter and receiver are positioned parallel to one another. The transmitting antenna's mobile electrons are propelled back and forth by high frequency AC power. Electromagnetic radiation is created by the sinusoidal motion of the electrons, which also causes sinusoidal acceleration. The magnetic field oscillates vertically while the electric field oscillates horizontally in the case of radiation that moves to the right. The electrons in the receiver are accelerated and driven back and forth by this horizontally oscillating electric field. This makes the receiving antenna's light glow.

The transmitter and receiver shown in the following image have their metal rods positioned such that they are parallel to one another. The mobile electrons of the receiver cannot fluctuate when the metal rods of the transmitter and receiver are aligned perpendicularly. As a result, the bulb that was attached to the receiving antenna did not illuminate.

By examining the aforementioned two instances, we can draw the conclusion that the receiving antenna should always be positioned so that the metal rods of the transmitter are parallel to the metal rods of the receiving antenna in order to effectively receive the signal from the transmitter.

The television antenna shown in the following figure is one that is typically mounted on a housetop. Receiving electromagnetic radiation that corresponds to the AC signals sent by the transmitting antenna at the transmitting station, the television antenna on top of the home serves as a receiver. The transmitting antenna's metal rods are positioned horizontally. It has been established that in order for the receiver to effectively receive the signal, the metal rods of the transmitting and receiving antennas must be positioned in parallel. As a result, we draw the conclusion that the transmitting antenna utilised by the transmitting station should be built so that its metal rods are horizontal and parallel to those of the receiving antenna.