Light as an electromagnetic wave

In summary: Additionally, since light is an electromagnetic wave, it interacts with charged particles and hence can be affected by magnetic fields. However, this interaction is very weak compared to the electric field component. As for why a compass does not respond to light, it is due to the extremely rapid changes in the magnetic field of light that make it difficult for a compass to accurately measure and respond to.
  • #1
Aeronautic Freek
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light is electromagnetic wave ,so does it also have magnetic and electric field,like all others waves(micro,gama,xray,radio waves etc..)?
i never heard that some one talk about light in sense of magnetic and electric field..

if it has ,why than compass don't response to light?
 
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  • #2
Aeronautic Freek said:
light is electromagnetic wave ,so does it also have magnetic and electric field,like all others waves(micro,gama,xray,radio waves etc..)?
Light is an electromagnetic wave, yes. I wouldn't say it "has" an electromagnetic field, so much as it is an electromagnetic field.
Aeronautic Freek said:
if it has ,why than compass don't response to light?
The magnetic component of a light wave flips direction 1015 times per second. If you can find a compass that'll flip direction 1015 times a second, it probably will react to the magnetic field of light.
 
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  • #3
Aeronautic Freek said:
i never heard that some one talk about light in sense of magnetic and electric field..

In the field of classical optics the description of light as an electromagnetic wave is central, and hence its electric and magnetic components are very important. As an example many optical instruments are sensitive to the waves polarization state, which tells you the transverse behaviour of the electric (or magnetic) field vector. You can have plane polarized EM waves in which the electric field oscillates within a plane, circular polarization whereby the electric field vector rotates around the direction of travel amongst other states such as elliptical polarization.
 

1. What is light as an electromagnetic wave?

Light is a form of electromagnetic radiation that is visible to the human eye. It is made up of oscillating electric and magnetic fields that travel through space at the speed of light.

2. How does light travel as an electromagnetic wave?

Light travels as a transverse wave, meaning that the electric and magnetic fields oscillate perpendicular to the direction of the wave's propagation. This allows light to travel through a vacuum, as well as through transparent mediums like air and water.

3. What is the relationship between light and other forms of electromagnetic radiation?

Light is just one form of electromagnetic radiation, which also includes radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays. These different forms of radiation have different wavelengths and frequencies, with light falling in the visible range of the electromagnetic spectrum.

4. How is light produced as an electromagnetic wave?

Light can be produced through a variety of processes, including thermal radiation, chemical reactions, and electrical discharges. In most cases, light is produced when electrons in atoms or molecules are excited and then return to a lower energy state, releasing energy in the form of light.

5. What are some practical applications of light as an electromagnetic wave?

Light has numerous practical applications, including communication (via fiber optics), imaging (such as in cameras and microscopes), and energy production (such as in solar panels). It also plays a crucial role in photosynthesis, the process by which plants convert light energy into chemical energy.

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