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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
Name the phenomenon which shows the quantum nature of electromagnetic radiation.
Name the region beyond the violet end of the spectrum called.
Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.
- Name the two waves.
- Compare the speeds of these waves when they travel in vacuum.
Name two sources, each of infrared radiations and ultraviolet radiations.
Which part of electromagnetic spectrum is used in radar systems?
50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1 mm thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of the aluminium foil that will allow 50% of the X-ray to pass through will be
X-ray from a Coolidge tube is incident on a thin aluminium foil. The intensity of the X-ray transmitted by the foil is found to be I0. The heating current is increased to increase the temperature of the filament. The intensity of the X-ray transmitted by the foil will be
(a) zero
(b) < I0
(c) I0
(d) > I0
For harder X-rays,
(a) the wavelength is higher
(b) the intensity is higher
(c) the frequency is higher
(d) the photon energy is higher.
For a given material, the energy and wavelength of characteristic X-rays satisfy
(a) E(Kα) > E(Kβ) > E(Kγ)
(b) E(Mα) > E(Lα) > E(Kα)
(c) λ(Kα) > λ(Kβ) > λ(Kγ)
(d) λ(Mα) > λ(Lα) > λ(Kα).
Name three radiations and their wavelength range which are invisible and beyond the violet end of the visible spectrum.
Give one use of electromagnetic radiations in Infrared radiation.
Choose the correct option.
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Answer briefly.
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| A. | Optical Fibre Communication |
P. | Ultrasound |
| B. | Radar | Q. | Infrared Light |
| C. | Sonar | R. | Microwaves |
| D. | Mobile Phones | S. | Radio Waves |
From the options given below, find the most appropriate match between entries in the left and the right column.
Name one radiation having the wavelength longer than the wavelength of these radiations.
