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प्रश्न
Why do astronauts talk to each other through radio telephone in space?
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उत्तर
Sound can not travel through vacuum. There is no material medium in the space for propagation of sound. Hence astronauts talk to each other through radio telephone in space. In radio telephone, message of one astronauts reach to the other with the help of radio waves, which can travel through vacuum.
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संबंधित प्रश्न
Choose the correct word/words to complete the following sentence :
When sound travels in a medium ____________
How is the frequency of a wave related to its time period?
How does the following factor affect, if at all, the speed of sound in air:
Pressure of air
How does the following factor affect, if at all, the speed of sound in air:
Moisture in air
The time period of a simple pendulum is 2 s. Find its frequency.
Select the correct option:
The SI unit of frequency is
State the main factors on which the speed of sound in a medium depends.
Does the speed of sound depend upon the direction of wind?
Is it possible to hear your friend's voice in vacuum? Give reason for your answer.
How will the following factors affect the speed of sound in air:
Humidity.
