Advertisements
Advertisements
प्रश्न
Explain briefly how electromagnetic waves are produced by an oscillating charge. How is the frequency of the em waves produced related to that of the oscillating charge?
उत्तर
An oscillating charge is considered as the accelerating charge. This produces on oscillating electric field in space, which produces an oscillating magnetic field, which again produces oscillating electric field and so on. These oscillating electric and magnetic field thus keep on regenerating each other as the wave propagates through the space.
Thus, the frequency of the electromagnetic waves naturally equals the frequency of oscillation of the charge
संबंधित प्रश्न
How are em waves produced by oscillating charges?
How is the speed of em-waves in vacuum determined by the electric and magnetic field?
Which em waves lie near the high frequency end of visible part of em spectrum? Give its one use. In what way this component of light has harmful effects on humans?
The energy associated with light of which of the following colours is minimum :
What is displacement current?
Explain the importance of Maxwell’s correction.
A pulse of light of duration 10-6 s is absorbed completely by a small object initially at rest. If the power of the pulse is 60 x 10-3 W, calculate the final momentum of the object.
Electromagnetic waves are produced by ______.
The electric field in a plane electromagnetic wave is given by `vecE = 200cos[((0.5 xx 10^3)/m)x - (1.5 xx 10^11 "rad"/s xx t)]V/mhatj`. If the wave falls normally on a perfectly reflecting surface having an area of 100 cm2. If the radiation pressure exerted by the E.M. wave on the surface during a 10-minute exposure is `x/10^9 N/m^2`. Find the value of x.
In a plane electromagnetic wave, the direction of electric field and magnetic field are represented by `hat"k"` and 2`hat"i" - 2hat"j"`, respectively. What is the unit vector along direction of propagation of the wave.
