Advertisements
Advertisements
Question
What are the directions of electric and magnetic field vectors relative to each other and relative to the direction of propagation of electromagnetic waves?
Solution
Since electromagnetic waves are transverse in nature. We have electric and magnetic fields associated with an electromagnetic wave perpendicular to each other and perpendicular to the direction of propagation of electromagnetic waves.
Let the direction of electric field and magnetic field is along Y- and Z- axis then the direction of propagation of EM waves will be in positive X-axis.
RELATED QUESTIONS
About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average intensity of visible radiation
(a) at a distance of 1 m from the bulb?
(b) at a distance of 10 m?
Assume that the radiation is emitted isotropically and neglect reflection.
What is the ratio of the speed of gamma rays to that of radio waves in a vacuum?
Write the following radiations in ascending order with respect to their frequencies:
X-rays, microwaves, UV rays and radio waves.
Can an electromagnetic wave be polarised?
State any one property which is common to all electromagnetic waves.
The dimension of `1/(mu_0 ∈_0)` is
Give two uses of IR radiation.
A plane electromagnetic wave of frequency 500 MHz is travelling in a vacuum along a y-direction.
At a particular point in space and time, `vec"B"` = 8.0 × 10-8 `hat"Z"`T. The value of the electric field at this point is ______.
(speed of light = 3 × 108 ms-1)
`hat x, hat y, hat z` are unit vectors along x, y, and Z directions.
The ratio of the magnitudes of the electric field and magnetic field of a plane electromagnetic wave is ______.
What is the source of energy of electromagnetic waves?