Is it true that when two astronauts floating close to each other in space can talk to each other without using any special device ?

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True

False

answer is B.

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Detailed Solution

The above statement is false.
Two astronauts floating close to each other in space cannot talk to each other without using any special device because there is no medium in space and sound needs medium to travel. As there is vacuum in space, it means there are no molecules or particulate matter between them for the sound to travel. However, they can talk if they use special radio devices. These radio devices are in-built into the astronaut’s helmet, and in this way, the astronauts can communicate to each other in space.
The correct statement would be sound requires a medium for propagation.In space there will be no medium for sound waves to travel and it will be vacuum. Sound cannot travel in vacuum hence sound cannot be heard without any special device.

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