Question

State Maxwell's theory of electromagnetic waves is related to light. Write down four characteristics of electromagnetic waves.

Answer 1

Hint :
We can know about Maxwell's theory if we properly interpret Maxwell's equation.
All electromagnetic waves contain electric field & magnetic field oscillation with propagation wave vector $\left( {\vec k} \right)$

Complete Step by step Solution:

As per maxwell, light waves have changing E $\left( {Electric} \right){\text{ }}and{\text{ }}B\left( {magnetic} \right)$
fields.
Changing electric field comes with varying space and time components of the magnetic field.
Changing magnetic field comes with varying space and electric components of the electric field.
The change $\vec E$ and $\vec B$ with a fixed wave vector $\vec u$ can also travel in vacuum without the need for medium.
The four characteristics of electromagnetic wave :
(i) $E.M$. waves travel at almost the speed of light in different medians.
(ii) $E.M$. waves have mutually varying electric and magnetic fields both parabasis to each other.
(iii) $E.M$. waves have fixed amplitude and frequency and a fixed wave vector $\vec k$

Note: All $\vec E,\,\,\vec B\,\,\& \,\,\vec u$ are perpendicular to each other. Electric field $\left( {\vec E} \right)$ amplitude is always more than magnetic field $\left( {\vec B} \right)$