Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- you mean by satellites? Write done some ofits uses?
- Satellites: Satellites are spacecrafts, which revolve around a planet in specific orbits
- Geostationary Orbits
- These revolve in particular orbits, which are called geostationary orbits
- Importance of Satellites
- • T.V displays slides about the address of any celebrity or about different matches
- world Olympics, Taravih in Ramzan-ul-Mubark and sacred occasions of Haj, before
- the commencement of programme. All these programmes are relayed through
- artificial-satellites.
- • There are some communication satellites, which relay the telephonic conservation
- and sendthe T.V programmes all over the world.
- Electrical Power for Satellites
- Electrical power of satellites is provided from panels of solar cells. These panels
- convert solar energy to electricity.
- The space-craft raveling for away from the sun carry small nuclear reactors with
- them to generate the required power.
- What do you mean by radar system? How does it work? Write down some of its
- uses.
- Radar: The word radar is derived from radio-detection and ranging
- Radar is a reliable instrument for sending and receiving electromagnetic waves,
- which are usually in the form of radio waves or microwaves.
- Electromagnetic waves travel with speed of light. Its characteristics depend on the
- wavelength.
- Radar remote detection system is used to locate and identify objects.
- CSAE
- CESE
- BERGS
- 8
- IAMONT-DOERD
- ARIH OESA
- Working of Radar
- Radar transmits short pulses of high frequency radio waves by means ofa revolving
- aerial. When pulses strike an object, these are reflected, which are received by radar
- antenna. A trace or shape pf that object appears on a reason. Radar can determinea
- numberofproperties ofdistants such as its distance. speed and direction ofmotion.
- Q.4
- A
Advertisement
Add Comment
Please, Sign In to add comment
