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प्रश्न
Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
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उत्तर
Radio waves are used by astronauts to communicate with one another on moon because radio waves do not require any material medium for its propagation.
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संबंधित प्रश्न
Fill in the blank.
Sound requires a ________ for propagation.
Out of solids, liquids and gases :
(a) in which medium sound travels slowest?
(b) in which medium sound travels fastest?
Fill in the blank with suitable word.
Sound cannot travel through ____________.
Describe in brief, with the aid of a lebelled diagram, an experiment to demonstrate that a material medium is necessary for propagation of sound.
Answer the following question :
How does the speed of sound differ in different media?
Does the speed of sound in a gas depend on the pressure of the gas?
Explain the effect of density on the speed of sound.
Can we hear sounds of frequencies:
More than 20 KHZ
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