**Contents**show

## What is the formula of electromagnetic wave?

Conclusion. Electromagnetic radiation can be described by its amplitude (brightness), wavelength, frequency, and period. By the equation E = h ν E=hnu E=hν , we have seen how the frequency of a light wave is proportional to its energy.

## How are electromagnetic waves represented mathematically?

A mathematical representation of electromagnetic wave is given by the two equations E = E cos (kx – wt) and B=B cos(kx-ot), where is the amplitude of the electric field and B is the amplitude of Othe magnetic field.

## What is the name of the mathematical expressions that describe the behavior of electromagnetic waves?

Maxwell’s prediction of electromagnetic waves resulted from his formulation of a complete and symmetric theory of electricity and magnetism, known as Maxwell’s equations. These four equations are paraphrased in this text, rather than presented numerically, and encompass the major laws of electricity and magnetism.

## What is the electromagnetic wave theory?

Description: Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. They are hence known as ‘electromagnetic’ waves. The electric field and magnetic field of an electromagnetic wave are perpendicular (at right angles) to each other.

## What is electromagnetic wave theory class 11?

The main points of electromagnetic wave theory were : When an electrically charged particle moves under acceleration, alternating electrical and magnetic fields are produced and transmitted. These fields are transmitted in the form of waves. These waves are called electromagnetic waves or electromagnetic radiations.

## How do you calculate the wavelength of an electromagnetic wave?

How to calculate wavelength

- Determine the frequency of the wave. For example, f = 10 MHz . …
- Choose the velocity of the wave. …
- Substitute these values into the wavelength equation λ = v/f .
- Calculate the result. …
- You can also use this tool as a frequency calculator.

## How did Hertz prove the electromagnetic wave theory?

Hertz proved the existence of radio waves in the late 1880s. He used two rods to serve as a receiver and a spark gap as the receiving antennae. Where the waves were picked up, a spark would jump. Hertz showed in his experiments that these signals possessed all of the properties of electromagnetic waves.

## What does Hz stand for in electromagnetic spectrum?

Wavelength is usually measured in meters (m). Frequency is the number of cycles of a wave to pass some point in a second. The units of frequency are thus cycles per second, or Hertz (Hz). Radio stations have frequencies. They are usually equal to the station number times 1,000,000 Hz.

## Who found the four mathematical equations that light has electric and magnetic properties?

James Maxwell manipulated his four equations and found that one possible mathematical solution to the way electricity and magnetism works is a wave. The most distinctive property of this wave was that it traveled at 186,000 miles per second, the speed of light. This meant that light was an electromagnetic wave.

## Why electromagnetic theory is needed?

EM theory is an essential basis for understanding the devices, methods, and systems used for electrical energy. Both electric and magnetic fields are defined in terms of the forces they produce.

## What are the 4 Maxwell equations?

The four Maxwell equations, corresponding to the four statements above, are: (1) div D = ρ, (2) div B = 0, (3) curl E = -dB/dt, and (4) curl H = dD/dt + J. In the early 1860s, Maxwell completed a study of electric and magnetic phenomena.

## Who proposed the electromagnetic theory?

Many books and papers have been written on electromagnetic theory since 1864 when James Clerk Maxwell (1831–79), a British physicist, first formulated the fundamental equations of electromagnetism.