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physics user1
So i know that magnetic field lines are closed, in an electromagnetc wave how can be these lines closed? i cannot picture this in my head
Is an antenna in the middle?Drakkith said:I believe they look something like the following:
cpxuvs said:Is an antenna in the middle?
Electromagnetic waves, or EM waves, are a type of energy that travels through space. They are composed of oscillating electric and magnetic fields that are perpendicular to each other and to the direction of wave propagation. EM waves can range in frequency from very low, such as radio waves, to very high, such as gamma rays.
EM waves are created when an electric charge is accelerated or moved back and forth. This can happen naturally, as with lightning, or artificially, as with radio antennas. The changing electric and magnetic fields produced by the moving charge create a self-propagating wave that can travel through space.
EM waves and magnetic field lines are closely related. As mentioned earlier, EM waves are composed of oscillating electric and magnetic fields. The direction of the electric field is perpendicular to the direction of wave propagation and the direction of the magnetic field is perpendicular to both the electric field and the direction of wave propagation. This means that as an EM wave travels through space, the electric and magnetic fields are constantly changing in direction and magnitude.
Magnetic field lines do not directly affect EM waves, but they are essential in understanding the behavior of EM waves. Magnetic field lines show the direction and strength of a magnetic field, which is an important component of EM waves. The changing magnetic field is what induces the electric field, which then produces the EM wave.
EM waves and magnetic field lines are used in many different technologies, such as radio and television broadcasting, cell phone communication, and medical imaging. They are also important in understanding the Earth's magnetic field and its interactions with the sun's magnetic field, which can affect GPS systems and power grids. Additionally, scientists use EM waves and magnetic field lines in their research to better understand the universe and its many phenomena.