Advertisements
Advertisements
प्रश्न
Which of the following electromagnetic radiations is used for viewing objects through fog ______.
पर्याय
microwave
gamma rays
X- rays
infrared
उत्तर
Which of the following electromagnetic radiations is used for viewing objects through fog infrared.
APPEARS IN
संबंधित प्रश्न
Can an electromagnetic wave be deflected by an electric field or a magnetic field?
Which of the following have zero average value in a plane electromagnetic wave?
(a) Electric field
(b) Magnetic field
(c) Electric energy
(d) Magnetic energy
A point charge is moving along a straight line with a constant velocity v. Consider a small area A perpendicular to the motion of the charge. Calculate the displacement current through the area when its distance from the charge is x. The value of x is not large, so that the electric field at any instant is essentially given by Coulomb's law.
The dimension of `1/(mu_0 ∈_0)` is
Write notes on Gauss' law in magnetism.
Explain the types of absorption spectrum.
The speed of plane electromagnetic waves is maximum in ______.
Dimensions of ε0 `(d phi_ε)/(dt)` are of
Which of the following type of radiations are radiated by an oscillating electric charge?
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.