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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
Describe a simple experiment which demonstrates that the sound produced by a tuning fork is due to vibrations of its arms.
Explain the terms crest and trough in relation to a transverse wave.
How does the following factor affect, if at all, the speed of sound in air:
Moisture in air
The correct statement is :
The time period of a simple pendulum is 2 s. Find its frequency.
Define the term wavelength.
State four differences between the sound wave and the light wave.
What is meant by the term wave motion?
Can sound travel through vacuum?
How will the following factors affect the speed of sound in air:
Temperature of air.
