Advertisements
Advertisements
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
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Name the high energetic invisible electromagnetic waves which help in the study of the structure of crystals
What do you understand by the statement, "Electromagnetic waves transport momentum"?
Arrange the following radiations in the order of their increasing wavelength:
X-rays, infrared rays, ratio waves, gamma ray and microwaves.
What is the range of the wavelength of the following electromagnetic waves?
(a)X-rays,
Name the waves used for taking photographs in dark.
An X-ray beam can be deflected
Consider a photon of a continuous X-ray coming from a Coolidge tube. Its energy comes from
Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,
X-ray incident on a material
(a) exerts a force on it
(b) transfers energy to it
(c) transfers momentum to it
(d) transfers impulse to it.
The X-ray coming from a Coolidge tube has a cutoff wavelength of 80 pm. Find the kinetic energy of the electrons hitting the target.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Answer briefly.
Give two uses of ultraviolet rays.
Answer briefly.
Name the most harmful radiation entering the Earth's atmosphere from outer space.
If the Earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
X-rays, gamma rays and microwaves travelling in a vacuum have ______.
Radio waves of constant amplitude can be generated with.
What happens to the intensity of light from a bulb if the distance from the bulb is doubled? As a laser beam travels across the length of a room, its intensity essentially remains constant. What geometrical characteristic of LASER beam is responsible for the constant intensity which is missing in the case of light from the bulb?
Write two uses of the following radiation.
X-rays
Identify the electromagnetic wave whose wavelength range is from about 10-3 m to about 10-1 m. Write one use of this.
