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
Why are microwaves considered suitable for radar systems used in aircraft navigation?
What role dose infra-red radiation play in maintain the Earth’s warmth
State Moseley's law
What is the range of the wavelength of the following electromagnetic waves?
(a) Gamma rays.
Visible light passing through a circular hole forms a diffraction disc of radius 0.1 mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be
Consider a photon of continuous X-ray and a photon of characteristic X-ray of the same wavelength. Which of the following is/are different for the two photons?
Name the scientist who discovered
X-rays
Name the scientist who discovered Microwaves
| Gamma rays | D | C | Visible light | B | A |
The above table shows different parts of the electromagnetic spectrum.
(a) Identify the parts of the spectrum marked as A, B, C and D.
(b) Which of the radiations A or B has the higher frequency?
(c) State two properties which are common to all parts of the electromagnetic spectrum.
(d) Name one source of each of the radiation of electromagnetic spectrum.
(e) Name one detector for each of the radiation.
(f) Name one use of each of the radiation.
Name the radiation of the electromagnetic spectrum which is used for the following:
Radar and Give the frequency range.
Name the radiation of the electromagnetic spectrum which is used for the following:
For taking photographs of the sky during the night and foggy conditions . Give the frequency range
How will you investigate the existence of the radiation beyond the red and violet extremes of the spectrum?
Give one use of electromagnetic radiation in Microwaves.
Answer briefly.
Can we produce a pure electric or magnetic wave in space? Why?
Answer briefly.
Give two uses of ultraviolet rays.
Solve the numerical problem.
Calculate the frequency in MHz of a radio wave of wavelength 250 m. Remember that the speed of all EM waves in a vacuum is 3.0 × 108 m/s.
Following QN ∴ 14, the radiation force on the roof will be
Find the photon energy in units of ev for electromagnetic wave if waves length 40 m. Given h = 6.63 × 10–34 J.
Choose the correct option related to wavelengths (λ) of different parts of the electromagnetic spectrum.
Below is an incomplete table showing the arrangement of electromagnetic spectrum in the increasing order of their wavelength. Complete the table:
| Gamma ray | X - ray | UV rays | Visible rays | Infrared | A | Radio waves |
- Identify the radiation A.
- Name the radiation used to detect fracture in bones.
- Name one property common to both A and Radio waves.
