No, two people cannot talk to each other normally in space without special devices.
Why Normal Conversation Fails in Space
Sound requires a medium, like air, to travel. In space, there is a vacuum, meaning there is no such medium.
- Sound Needs a Medium: Sound waves are vibrations that need a substance (like air, water, or solid material) to propagate.
- Space is a Vacuum: Space is essentially a vacuum with extremely low density of matter. Thus, it cannot carry sound waves.
- No Sound Transmission: Because of the vacuum, vibrations (sound) from one astronaut's mouth will not reach another astronaut's ears.
How Astronauts Communicate in Space
Since normal talking is impossible, astronauts use special equipment.
- Radios: Astronauts use radios and headsets to communicate with each other and with ground control.
- Vocal Communication Devices: Spacesuits include microphones and speakers that use radio waves, not sound waves, to transmit voices.
In Summary
According to the provided reference, "two astronauts floating close to each other in space will not be able to talk to each other without using any special device because in space there is vacuum ( no material medium)". Therefore, everyday verbal conversation is impossible in space due to the absence of a medium for sound propagation. Astronauts rely on radio communication to interact.
