Advertisements
Advertisements
Question
Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
Sound requires a ________ for propagation.
In which medium sound travels faster : air or iron?
In which medium sound travels fastest : air, water or steel?
Explain the experiment, with a neat diagram, to prove the following:
'Sound needs material medium for propagation.'
State two properties of medium on which the speed of sound in it depends.
How long will sound take to travel in (a) and iron rail and (b) air, both 3.3 km in length? Take speed of sound in air to be 330 m/s and in iron to be 5280 m/s.
What are the requisites of the medium for the propagation of sound? Briefly, explain them.
Does audible range of frequency vary from person and also with the age of the person?
Sound cannot travel in ______.
______ is the distance between two consecutive particles.
