Sunday, October 18, 2009

The Miracle of Radio (Questions and Answers)

Q.1: At what speed do wireless waves move? What other waves move at this speed?

Ans: The wireless waves move at the speed of 299792.5 Kilometres per second. The light waves also move at the same speed.

Q.2: Why were wireless waves once called Hertzian waves?

Ans: Wireless waves were once called Hertzian waves because Heinrich Hertz, the German scientist was the first person who discovered these waves.

Q.3: In what years were wireless signals first transmitted over the English Channel and the Atlantic Ocean? Who was responsible for these successful experiments?

Ans: The wireless signals were first transmitted over the English Channel in 1896 and across the Atlantic Ocean in 1901. Marconi was responsible for both of these successful experiments.

Q.4: What facts are given in the text about the first use of wireless to bring help to a ship in distress?

Ans: When the Liner Republic collided with another ship in Atlantic Ocean, wireless signals were, for the first time used to seek help.

Q.5: Could speech be transmitted in the early days of wireless signalling? If not how were messages transmitted?

Ans: No, speech could not be transmitted in the early days of wireless signalling. The Morse code was sued instead of speech.

Q.6: During what period did sound broadcasting became generally established?

Ans: Sound broad casting became generally established in 1920’s.

Q.7: In what way is television an advance upon sound broad-casting?

Ans: Television is an advance upon sound broadcasting since pictures and not just sound can be sent by it.

Q.8: Is television in colour possible? If so, why is it not in general use?

Ans: Television in colour has been made possible. It is not in general use because it is expensive.

Q.9: What is the function of Radar?

Ans: The function of Radar is to locate position of aircraft ship.

Q.10: What use can the astronomer make of radio?

Ans: The astronomer can now explore the vast universe by the use of radio telescope. It works by detecting radio waves sent by distant stars.


14 Responses to “The Miracle of Radio (Questions and Answers)”

anjli said...
February 29, 2012 at 1:13 AM

nice thanks alot...>>

Anonymous said...
September 28, 2014 at 7:26 AM

there is an mistake in question NO.5 answer (the Morse code was sued) not the Morse code used is right

Anonymous said...
October 4, 2015 at 7:47 AM


ghulam mustafa said...
October 18, 2015 at 9:59 AM


Rukhssar Abro said...
December 25, 2015 at 6:11 PM


Anonymous said...
May 18, 2016 at 7:34 AM

actually the wireless signals were transmitted to the english channel in 1899

Anonymous said...
October 14, 2016 at 12:08 PM

Good answers thanks.

Anonymous said...
October 3, 2017 at 9:40 AM

Thanks a lot i really appreciate..

Unknown said...
January 23, 2019 at 8:09 AM

it's easy to learning

Unknown said...
February 14, 2019 at 2:42 AM


Unknown said...
February 23, 2019 at 1:12 AM

Answer no 9 kuch ziada hi short nai hai Kia hum itna short like sakhte Hain ?🤔

Unknown said...
March 6, 2019 at 12:24 AM

Q how can radio be regarded as miracle these days ?
Ans please

Unknown said...
May 4, 2019 at 8:27 AM


Unknown said...
May 4, 2019 at 6:37 PM

yr apne is say yad kr k likhe the question ap k numbers kese aye the is say likhne k bad

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