What is the exact speed of light in vacuum as defined in 1983?
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c = 2.997 924 58 * 10^8 m/s.
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What is the exact speed of light in vacuum as defined in 1983?
c = 2.997 924 58 * 10^8 m/s.
What is the form of the electromagnetic wave equations derived from Maxwell's Equations?
∇²E = μ₀ε₀ ∂²E/∂t² and ∇²B = μ₀ε₀ ∂²B/∂t².
What is the significance of the symmetry in Maxwell's Equations?
It suggests that electromagnetic waves propagate in a direction symmetrical to both electric and magnetic fields.
In a plane wave propagating in vacuum, what is the relationship between the electric field and the direction of propagation?
The electromagnetic wave has no electric field component in the direction of propagation.
What does the disturbance in the electromagnetic field represent?
An untethered wave that moves independently of its source.
How do electric and magnetic fields regenerate each other?
Through an endless cycle where a time-varying electric field generates a magnetic field and vice versa.
What significant conclusion about the speed of light was made by Einstein?
The speed of light is independent of both the motion of the source and the observer.
What was the predicted speed of all electromagnetic waves in free space according to Maxwell?
v ≈ 3 * 10^8 m/s.
What character of light must be explained within the context of electromagnetic theory?
The experimentally verified transverse character of light.
How did Maxwell relate his theoretical prediction of the speed of light to previous experiments?
His theoretical value was in remarkable agreement with the previously measured speed of light determined by Fizeau.
What induces a magnetic field according to electromagnetic theory?
A time-varying electric field.
What characterizes the relationship between the electric and magnetic fields in an electromagnetic wave?
They are generally perpendicular to each other and to the direction of wave propagation.
What does the transverse nature of the electric field imply about the polarization of light?
The direction of the vibrating E-field vector is fixed, corresponding to the polarization of the light.
What symbol is commonly used to designate the speed of light in vacuum?
c, which comes from the Latin word 'celer', meaning fast.
What equation describes the space and time variations of electromagnetic fields?
The scalar differential wave equation.
What happens to the induced magnetic field when the charge is accelerating?
The induced magnetic field becomes time-dependent.
What occurs when a charge accelerates from rest?
The electric field is altered and this alteration propagates out into space at a finite speed.
