# How the speed of EM waves can be determined using electric and magnetic fields?

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Basic properties of electromagnetic are electric field and magnetic field perpendicular to one another in plane waves, the direction of propagation of is given by electric field x magnetic field, and the speed is calculated as wavelength times frequency.

## How is the speed of an EM wave determined by electric and magnetic field?

How is the speed of em-waves in vacuum determined by the electric and magnetic field? The speed of the em-waves in a vacuum is determined by the ratio of the peak value of electric and magnetic fields.

## How is the speed of EM-waves in vacuum determined by the electric and magnetic fields give the mathematical form only?

The speed of the em-waves in a vacuum is determined by the ratio of the peak value of electric and magnetic fields. At a place, the horizontal component of earth’s magnetic field is B and angle of dip are 60o.

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## What determines the speed of an EM wave?

The speed of a wave is a product of its wavelength and frequency. Because all electromagnetic waves travel at the same speed through space, a wave with a shorter wavelength must have a higher frequency, and vice versa. This relationship is represented by the equation: Speed = Wavelength × Frequency.

The ratio of the electric to magnetic fields in an electromagnetic wave in free space is always equal to the speed of light. … Recall that the speed of light is related to the permeability and permittivity constants.

## How is the speed of electromagnetic waves in vacuum?

A large family of waves, each with a different wavelength range is called the electromagnetic spectrum (sometimes shortened to the EM spectrum). These waves all travel at the speed of light (300,000,000 metres per second) in a vacuum.

## How is the speed of EM waves in vacuum?

is the speed of light (i.e. phase velocity) in a medium with permeability μ, and permittivity ε, and ∇2 is the Laplace operator. In a vacuum, vph = c = 299,792,458 meters per second, a fundamental physical constant.

## Is electric field a wave?

Electromagnetic Wave: Electromagnetic waves are a self-propagating transverse wave of oscillating electric and magnetic fields. … This means that an electric field that oscillates as a function of time will produce a magnetic field, and a magnetic field that changes as a function of time will produce an electric field.

## What is the relation between electric field and magnetic field?

The electric field is actually the force per unit charge experienced by a non moving point charge at any given location within the field, whereas the magnetic field is detected by the force it exerts on other magnetic particles and moving electric charges.

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## Do EM waves induce current?

The inverse effect also happens: if an electromagnetic wave strikes a wire, it induces an alternating current of the same frequency in the wire. This is how the receiving antennas of a radios or television sets work.

## Do EM waves change speed?

Factors Affecting Wave Speed:

Electromagnetic waves, like any wave, have a finite speed value which is dependent upon the properties of the medium through which it flows. … The speed of a wave is independent of its frequency and wavelength. A change in the frequency value will not result in a change in the speed value.

## What is the most important electromagnetic wave?

The different types of waves have different uses and functions in our everyday lives. The most important of these is visible light, which enables us to see. Radio waves have the longest wavelengths of all the electromagnetic waves. They range from around a foot long to several miles long.

## How do you calculate the electromagnetic field?

We discuss the properties of electromagnetic waves in cavities, waveguides, and transmission lines. The fields B (magnetic flux density) and E (electric field strength) determine the force on a particle of charge q travelling with velocity v (the Lorentz force equation): F = q (E + v × B).

## Why are electric and magnetic fields in phase?

The electric and the magnetic field form the electromagnetic wave which is dynamic travelling with speed of light in space. … If the electromagnetic wave is propagating in a lossy medium, the wave impedance will be complex, this means that there will be some form of phase shift between E and H.

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## How do you find the maximum electric field?

Maximum Electric Field of a Ring

1. The elctric field at distance z from the centre of the ring on the axis of the ring with charge (Q=2pi Rlambda) is given by E=frac{lambda r}{2epsilon_0}frac{z}{(z^2+r^2)^{3/2}}
2. The maximum field is obtained by setting frac{dE}{dz}=0.
3. This gives (z^2+r^2)^{1/2}(r^2-2z^2)=0. 