Advertisements
Advertisements
प्रश्न
What do you understand by the statement, "Electromagnetic waves transport momentum"?
Advertisements
उत्तर
If we consider a plane perpendicular to the direction of propagation of the electromagnetic wave then electric charges present on the plane will be set and sustained in motion by the electric and magnetic fields of the electromagnetic wave. The charges present on the surface thus acquire energy and momentum from the waves. This just illustrates the fact that an electromagnetic wave (like other waves) transfers energy and momentum.
APPEARS IN
संबंधित प्रश्न
Give a reason for the following:
It is necessary to use satellites for long-distance TV transmission. Why?
An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60 cm.name the medium through which it is travelling
The distance between the cathode (filament) and the target in an X-ray tube is 1.5 m. If the cutoff wavelength is 30 pm, find the electric field between the cathode and the target.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name the scientist who discovered Microwaves
How will you investigate the existence of the radiation beyond the red and violet extremes of the spectrum?
State two properties of infrared radiations which differ from visible light.
State three properties of ultra-violet radiation similar to visible light.
Answer briefly.
Does an ordinary electric lamp emit EM waves?
Name the e.m. waves which are suitable for radar systems used in aircraft navigation. Write the range of frequency of these waves.
Ozone layer above the earth's atmosphere will
