two astronauts cannot talk to each other in space without a wireless. Why?
Answers
Answer:
Sound waves travel by vibrations of molecules. ... Thus the speed of sound in air is slower as compared to solids and liquids. Now, when the two astronauts are floating close to each other in space, without the use of any special device, they cannot talk to each other because there is vacuum between them.
Answer: Astronauts float around in space because there is no gravity in space. Everyone knows that the farther you get from Earth, the less the gravitational force is. Astronauts are so far from the Earth that gravity is so small. There is no atmosphere in space, therefore propagation of sound is not possible there. Sound needs a material medium for their propagation. In the space, there is no material medium so astronauts cannot listen to each other.
Hence, to do conversation on space the astronauts uses an instrument which can transmit and detect electromagnetic waves.