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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
Define the terms 'frequency', 'wavelength' and 'velocity' of a sound wave. What is the relation between them?
Fill in the blank and explain.
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State three characteristics of the medium required for propagation of sound?
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Complete the following sentences :
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______ is the distance between two consecutive particles.
the speed of sound in air is 331 ms-1 at ______ and ______ at 22°C.
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