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प्रश्न
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
Name the parts of the electromagnetic spectrum which is suitable for radar systems used in aircraft navigation.
Write in brief, how these waves can be produced.
Name the em waves which are suitable for radar systems used in aircraft navigation
Name an electromagnetic wave which is used in the radar system used in aircraft navigation
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उत्तर
Microwaves or Radio waves are suitable for the radar system in aircraft navigation.
These rays are produced by special vacuum tubes, namely Klystrons, magnetrons and Gunn diodes.
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संबंधित प्रश्न
What is the range of the wavelength of the following electromagnetic waves?
(a) Micro waves .
Name the region beyond the red end of the spectrum.
Name the region beyond the violet end of the spectrum called.
Name the waves produced by the changes in the nucleus of an atom.
X-ray and visible light travel at the same speed in vacuum. Do they travel at the same speed in glass?
The energy of a silver atom with a vacancy in K shell is 25.31 keV, in L shell is 3.56 keV and in M shell is 0.530 keV higher than the energy of the atom with no vacancy. Find the frequency of Kα, Kβ and Lα X-rays of silver.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
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- Name the medium through which it is traveling.
Arrange the following electromagnetic waves in increasing order of their frequencies (i.e. begin with the lowest frequency):
Visible light, y rays, X rays, microwaves, radio waves, infrared radiations, and ultraviolet radiation.
Define the term "Intensity" in the photon picture of electromagnetic radiation.
How will you investigate the existence of the radiation beyond the red and violet extremes of the spectrum?
Name the radiations used for the detection of fracture in bones.
Answer briefly.
Does an ordinary electric lamp emit EM waves?
Solve the numerical problem.
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All components of the electromagnetic spectrum in a vacuum have the same ______
Identify the electromagnetic wave whose wavelength range is from about 10-12 m to about 10-8 m. Write one use of this.
Identify the part of the electromagnetic spectrum which:
- produces the heating effect.
- is absorbed by the ozone layer in the atmosphere.
- is used for studying crystal structure.
Write any one method of the production of each of the above radiations.
In an atom X, electrons absorb the energy from an external source. This energy “excites” the electrons from a lower-energy level to a higher-energy level around the nucleus of the atom. When electrons return to the ground state, they emit photons.
The figure below is the energy level diagram of atom X with three energy levels, E1 = 0.00eV, E2 = 1.78eV and E3 = 2.95eV. The ground state is considered 0 eV for reference. The transition of electrons takes place between levels E1 and E2.
- What wavelength of radiation is needed to excite the atom to energy level E2 from E1?
- Suppose the external source has a power of 100 W. What would be the rate of photon emission?
At what speed do all electromagnetic waves travel in a vacuum?
Which radiation has the longest wavelength and lowest frequency in the electromagnetic spectrum?
Which description identifies how radio waves are mainly produced?
