Advertisements
Advertisements
प्रश्न
Why do astronauts talk to each other through radio telephone in space?
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.
APPEARS IN
संबंधित प्रश्न
Explain with an example, the propagation of sound in a medium.
Name the two kinds of waves in form of which sound travels in a medium.
What is a longitudinal wave? In which medium: solid, liquid or gas, can it be produced?
Explain the terms crest and trough in relation to a transverse wave.
If you place your ear close to an iron railing which is tapped some distance away, you hear the sound twice. Explain why?
How does the following factor affect, if at all, the speed of sound in air:
Pressure of air
A longitudinal wave travels at a speed of 0.3 m s-1 and the frequency of wave is 20 Hz. Find the separation between two consecutive compressions.
Select the correct option:
The number of oscillations passing through a point in unit time is called:
Select the correct option:
The SI unit of frequency is
What is meant by the term wave motion?
