Advertisements
Advertisements
प्रश्न
Give two uses of IR radiation.
उत्तर
- To produce dehydrated fruits
- TV remote as a signal comer.
APPEARS IN
संबंधित प्रश्न
Which segment of electromagnetic waves has highest frequency? How are these waves produced? Give one use of these waves.
Arrange the following electromagnetic waves in decreasing order of wavelength:
Consider an oscillator which has a charged particle oscillating about its mean position with a frequency of 300 MHz. The wavelength of electromagnetic waves produced by this oscillator is ______.
An e.m. wave is propagating in a medium with a velocity `vec"v" = "v" hat"i"`. The instantaneous oscillating electric field of this e.m. wave is along +y-axis, then the direction of an oscillating magnetic field of the e.m. wave will be along:
Give two uses of Microwaves.
Write down Maxwell equations in integral form.
The source of electromagnetic waves can be a charge ______.
- moving with a constant velocity.
- moving in a circular orbit.
- at rest.
- falling in an electric field.
Which of the following statement is NOT true about the properties of electromagnetic waves?
An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave in that medium will be ______ × 10-2 cm.
Write the two characteristics of electromagnetic waves.
