Propagation Of Electromagnetic Waves

Give (brief) reasons for the following : (a) We use 'sky wave' mode of propagation of electromagnetic waves, only for frequencies upto 30 to 40 MHz. (b) The LOS communication, via space waves, has a (fairly) limited range. (c) A mobile phone user gets uninterrupted link to talk while walking.

Electromagnetic waves are

In propagation of electromagnetic wave which of the following statement is correct?

If vec(E) and vec(B) represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of electromagnetic wave is along

In an electromagnetic wave the electric field vector and magnetic field vector are given as vecE=E_(0)hati and vecB=B_(0)hatk respectively. The direction of propagation of electromagnetic wave is along:

(a) When the oscillating electric and magnetic fields are along the X- and Y-direction respectively (i) point out the direction of propagation of electromagnetic wave, (ii) express the velocity of propagation in terms of the amplitudes of the oscillating electric and magnetic fields. (b) How do you show that an electromagnetic wave carries energy and momentum?

The electric field of a plane electromagnetic wave in vacuum is represented by vecE_x=0 , vecE_y=0.5 cos[2pixx10^8(t-x/c)], vecE_z=0 (a) What is the direction of propagation of electromagnetic wave? (b) Determine the wavelength of the wave. (c) Compute the component of associated magnetic field.

The electric field of a plane electromagnetic wave in vacuum is represented by vecE_x=0 , vecE_y=0.5 cos[2pixx10^8(t-x/c)], vecE_z=0 (a) What is the direction of propagation of electromagnetic wave? (b) Determine the wavelength of the wave. (c) Compute the component of associated magnetic field