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- Light may seem to be an exception, leading many to say that light is a wave that can travel through a vacuum with no medium. Light doesn't use EM fields as its medium; light IS an EM (electromagnetic) wave.
So it is an experimental fact that light does not need a medium to propagate. One thing that I'm surprised to know is that light is also called an electromagnetic wave. Does this include light of any kind, for example: light from a bulb, a tube, and also from the Sun?
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How any EM wave travels in a vacuum or an empty space as the...
- Why isn't the electromagnetic field considered as the medium ...
The answer is that when we say that electromagnetic waves do...
- Hot Linked Questions - Physics Stack Exchange
Nov 17, 2018 · The answer is that when we say that electromagnetic waves do not require a medium to propagate, what we mean is the following. Prior to the discovery of electromagnetic waves, the waves with which we were familiar took the form of disturbances in some material, such as air, water, or rock.
May 2, 2014 · Light doesn't use EM fields as its medium; light IS an EM (electromagnetic) wave. Maxwell's equations tell us that a magnetic field changing in time causes an electric field to change in space, and an electric field changing in time causes a magnetic field to change in space, etc.
- Radio Waves
- Microwaves
- Infrared
- Visible Light
- Ultraviolet
- X-Rays
- Gamma Rays
As the name suggests, radio waves are emitted by radiostations, TV stations, and cellphone towers. They have a wavelength range of 1-105meters.
Microwaves are used to broadcast information through spaceas they can penetrate through clouds and light rain. They are also used to heatfood, which led to the invention of the microwave oven.
Infrared radiation is thermal radiationthat carries heat.They are used in many infrared devices and remote sensing for weatherconditions.
Light is the only part of the electromagnetic spectrum thatis visible to the human eye. The eye perceives light as a combination ofseveral colors of different wavelengths. Light is made up of seven colors –violet, indigo, blue, green, yellow, orange, and red.
Ultraviolet light is emitted by the sun and is responsiblefor sunburn. They are used in “black lights” that make objects glow.
X-rays are used for medical purposes. They can penetratethrough the skin and tissue and reveal a detailed structure of the interior.
Distant astronomical bodies emit high energy gamma rays. They are also produced in the laboratory by bombarding subatomic particles with protons and neutrons and during a nuclear explosion.
The electromagnetic fields of light are not affected by traveling through static electric or magnetic fields in a linear medium such as a vacuum. However, in nonlinear media, such as some crystals, interactions can occur between light and static electric and magnetic fields—these interactions include the Faraday effect and the Kerr effect ...
Aug 12, 2012 · So light is made up of particles that we call photons, but it's also made up of waves of electric and magnetic fields which are electromagnetic waves. The question is, do those waves move through some medium like ripples on top of a pond, or do they just move through the vacuum of space?
People also ask
Does light use EM fields as a medium?
Why are electromagnetic fields the medium for electromagnetic waves?
Why is the electromagnetic field not accepted as a medium?
Is light an EM wave or a magnetic wave?
Are electromagnetic fields a medium or a substance?
Do electromagnetic waves need a medium to propagate?
Mechanical waves, unlike electromagnetic waves, require the presence of a material medium in order to transport their energy from one location to another. Sound waves are examples of mechanical waves while light waves are examples of electromagnetic waves.
