Why Do Accelerating Charges Generate Light?

In summary, when a charge is accelerating, it affects the electric and magnetic fields and causes electro-magnetic radiation, which is commonly referred to as light. This phenomenon occurs due to the interaction with another charge in the universe, which causes the charge to emit radiation as it accelerates. However, in the case of a charge accelerating in a gravitational field, the emission of radiation does not occur according to General Relativity. The exact reason for this is still not fully understood.
  • #1
Creebe
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Homework Statement


Why do accelerating charges generate light, whereas charges with constant velocities do not.


Homework Equations


No equations.


The Attempt at a Solution


A accelerating charge affects the E field and B field?
 
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  • #2
Creebe said:

Homework Statement


Why do accelerating charges generate light, whereas charges with constant velocities do not.

Homework Equations


No equations.

The Attempt at a Solution


A accelerating charge affects the E field and B field?
I think you mean electro-magnetic radiation, not necessarily light.

If you are looking for a simple answer, it is because if you introduce a time-dependent electric field into Maxwell's equations, the solution is an equation for an electro-magnetic wave.

This does not explain, however, why a charge accelerating in a gravitational field does not produce an electromagnetic wave (according to General Relativity, such a charge is equivalent to a charge at rest in an inertial reference frame).

The key may be that that in order to produce an accelerating charge - other than by gravity- the charge has to interact with another charge somewhere in the universe (either through an em wave or an electric or magnetic field). So it may be the interaction with another charge that causes the resulting emission of radiation (and the acceleration).

The answer to this question, interestingly enough, is still not clear: See: http://www.mathpages.com/home/kmath528/kmath528.htm" .

AM
 
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FAQ: Why Do Accelerating Charges Generate Light?

Why do accelerating charges generate light?

Accelerating charges generate light because they create electromagnetic radiation. As the charges accelerate, they create a disturbance in the electromagnetic field, which results in the emission of photons or light.

How do accelerating charges produce electromagnetic radiation?

The acceleration of charges results in the creation of a changing electric field, which in turn generates a changing magnetic field. These changing fields then propagate through space, creating electromagnetic waves or radiation.

Is the frequency of the light generated by accelerating charges dependent on the acceleration?

Yes, the frequency of the light produced by accelerating charges is directly proportional to the acceleration. This means that as the acceleration increases, so does the frequency or energy of the light produced.

What is the relationship between the speed of the accelerating charges and the wavelength of the emitted light?

The speed of the accelerating charges is directly related to the wavelength of the emitted light. As the speed of the charges increases, the wavelength of the light decreases, resulting in a higher frequency and energy of the light.

Can any type of accelerating charge produce light?

Yes, any type of accelerating charge can produce light. This includes both charged particles, such as electrons or protons, and charged objects, such as a charged metal rod. As long as there is acceleration, there will be the production of light.

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